N E W
CDT 2025 Coding Companion:
Training Guide for the Dental Team
The fundamental rule to apply in all coding situations is “code for
what you do.” The CDT 2025 Coding Companion can help you do just
that by walking staff through the steps needed to complete detailed
patient records and submit accurate claims. This instructional text
features more than 200 coding scenarios to provide you with step-
by-step examples for how to code different cases and treatments. It
includes examples of how to use new and revised codes, so no matter
the experience level, all coders will benefit from this 2025 edition.
For less experienced coding staff, the CDT 2025 Coding Companion
takes the stress out of coding with more than 270 questions and
answers to help prepare for any coding situation. Written by dental
coding experts and vetted by the ADA, the Coding Companion can be
trusted as the definitive source of coding information.
The CDT 2025 Coding Companion features:
• Descriptions and explanations of the code changes for 2025
• 200 coding scenarios and 270 questions and answers
• Key definitions and concepts for each category of service
• Numeric and alphabetic indices
J455BT Spiral-bound book +e-book, Approx. 432 pages
Members $69.95 Retail $109.95
Book ISBN: 978-1-68447-232-1 |e-book ISBN: 978-1-68447-233-8
N E W
CDT 2025: Current Dental Terminology
As the world changes and new technology and practices emerge,
the CDT Code evolves. Since 2020, there have been more than
200 changes to the CDT Code. It is important to be familiar with
CDT Code changes that dentists and staff need to more accurately
document and report the procedure delivered to a patient. Don’t risk
having claims rejected by getting caught with outdated information.
Accurate and detailed patient records are vital to the success of
your practice. CDT 2025: Current Dental Terminology gives you the
most current information needed to ensure your patient records are
correct and maximize reimbursement.
CDT 2025 changes include:
• 10 new codes
• 8 revisions
These codes are developed by the ADA and are the only
HIPAA-recognized code set for dentistry.
14 © 2024 American Dental Association • new procedure code s revision to a nomenclature or descriptor #Editorial
D1321 counseling for the control and prevention of adverse oral,
behavioral, and systemic health effects associated with
high-risk substance use
Counseling services may include patient education about adverse oral,
behavioral, and systemic effects associated with high-risk substance
use and administration routes. This includes ingesting, injecting, inhaling
and vaping. Substances used in a high-risk manner may include but are
not limited to alcohol, opioids, nicotine, cannabis, methamphetamine
and other pharmaceuticals or chemicals.
D1330 oral hygiene instructions
This may include instructions for home care. Examples include tooth
brushing technique, flossing, and use of special oral hygiene aids.
D1351 sealant – per tooth
Mechanically and/or chemically prepared enamel surface sealed to
prevent decay.
D1353 sealant repair – per tooth
D1352 preventive resin restoration in a moderate to high caries risk
patient – permanent tooth
Conservative restoration of an active cavitated lesion in a pit or fissure
that does not extend into dentin includes placement of a sealant in
any radiating non-carious fissures or pits.
D1354 application of caries arresting medicament – per toothto
Conservative treatment of an active, non-symptomatic carious lesion
by topical application of a caries arresting or inhibiting medicament
and without mechanical removal of sound tooth structure.
D1355 caries preventive medicament application – per tooth
For primary prevention or remineralization. Medicaments applied
do not include topical fluorides.
Space Maintenance (Passive Appliances)
Passive appliances are designed to prevent tooth movement.
D1510 space maintainer – fixed, unilateral – per quadrant
Excludes a distal shoe space maintainer.
D1516 space maintainer – fixed – bilateral, maxillary
D1517 space maintainer – fixed – bilateral, mandibular
200 real-life coding scenarios!
CDT 2025 features new and revised codes for:
• Administration of neuromodulators
• Administration of dermal fillers
• Removal of an indirect restoration on a natural tooth
• Replacement of an implant screw
• Partial extraction for immediate implant placement
• Placement of an interim direct restoration
• Repair of an implant/abutment supported prosthesis
In addition to providing the most up-to-date codes, CDT 2025
also includes access to the CDT e-book, mobile app and web app,
providing digital access to the full suite of CDT codes and descriptors.
You will also find ICD-10-CM codes for dental procedures, making
CDT 2025 the most valuable resource to meet your coding needs.
J025BTi Spiral-bound book +e-book +app, 194 pages
Members $94.95 Retail $139.95
Book ISBN: 978-1-68447-229-1 |e-book ISBN: 978-1-68447-231-4
J025i CDT 2025 App for iOS and Android |Members $89.99 Retail $89.99
© 2022 American Dental Association 139
Periodontics
Clinical Coding Scenario #2:
Periodontitis
A 49-year-old male patient presents for periodontal examination with a chief
complaint of sore and bleeding gums. His medical history is significant for type
II diabetes being treated with Metformin (glucophage) and hypertension, which
was being treated with a calcium channel blocker (nifedipine-adalat). He smokes
one pack of cigarettes a day. His last dental appointment was five years ago, and
there are heavy accumulations of plaque and calculus, both supra-gingival
and sub-gingival.
Since the amount of calculus and plaque prevented a periodontal evaluation
from being performed adequately, the patient was seen by the hygienist that
same day. Without using any anesthesia, she utilized an ultrasonic scaler to
debride supragingival calculus and plaque in all four quadrants. After reviewing
home care instructions and giving the patient chlorhexidine rinse, provided by
the office, the patient was scheduled to return in two weeks for a periodontal
evaluation and appropriate radiographic images.
How would these visits be coded?
Visit #1: Assessment and Debridement
D0191 assessment of a patient
D4355 full mouth debridement to enable a comprehensive oral
evaluation and diagnosis on a subsequent visit
D1330 oral hygiene instructions
D9630 drugs or medicaments dispensed in the office for home use
Visit #2: Evaluation, Diagnosis, and Treatment Planning
Two weeks later, the patient returned for radiographic images and a complete
periodontal evaluation.
The diagnosis is Stage III Grade C periodontitis with pocket depths ranging from
4 to 9 mm, furcation involvement, mobility, and localized recession. There are
interproximal papillae that exhibit swelling with a “granulated” surface appearance
to the soft tissue resembling hyperplasia possibly caused by the calcium channel-
blocking drug. Consultation with the patient’s internist to evaluate possibility
of changing the high blood pressure medication was done by the dentist.
Continued on next page
TABLE OF CONTENTS
SECTION 1 – THE CDT CODE: WHAT IT IS AND HOW TO USE IT
SECTION 2 – USING THE CDT CODE: DEFINITIONS AND KEY
CONCEPTS, CODING SCENARIOS AND CODING Q&A
CHAPTER 1 Diagnostic
CHAPTER 2 Preventive
CHAPTER 3 Restorative
CHAPTER 4 Endodontics
CHAPTER 5 Periodontics
CHAPTER 6 Prosthodontics, removable
CHAPTER 7 Maxillofacial Prosthetics
CHAPTER 8 Implant Services
CHAPTER 9 Prosthodontics, fixed
CHAPTER 10 Oral and Maxillofacial Surgery
CHAPTER 11 Orthodontics
CHAPTER 12 Adjunctive General Services
CHAPTER 13 Sleep Apnea Services
CHAPTER 14 Dental Benefits: What Every Dentist Should Know
SECTION 3 – APPENDICES
APPENDIX 1 Introduction to Medical Claim Form Completion
APPENDIX 2 CDT Code to ICD (Diagnosis) Code Crosswalk
(included in e-book)
APPENDIX 3 ADA Guide to Dental Procedures Reported with Area
of Oral Cavity on Tooth Anatomy (or Both) (included in e-book)
APPENDIX 4 CDT and ICD-10 Coding Recommendations
for Smoking Cessation (included in e-book)
APPENDIX 5 Understanding and Procedure Coding for
Patients with Special Health Care Needs (included in e-book)
Numeric Index by CDT Code, Alphabetic Index by Topic
© 2024 American Dental Association 35
V. Periodontics
in presence of generalized moderate or severe gingival
inflammation – full mouth, after oral evaluation
The removal of plaque, calculus and stains from supra- and sub-gingival tooth
surfaces when there is generalized moderate or severe gingival inflammation
in the of periodontitis. It is indicated for patients who have
swollen, inflamed gingiva, generalized suprabony pockets, and moderate
severe bleeding on probing. Should not be reported in conjunction
scaling and root planing, or debridement procedures.
D4355 full mouth debridement to enable a comprehensive periodontal
evaluation and diagnosis on a subsequent visit
localized delivery of antimicrobial agents via a controlled release
into diseased crevicular tissue, per tooth
FDA approved subgingival delivery devices containing antimicrobial
medication(s) are inserted into periodontal pockets to suppress the
pathogenic microbiota. These devices slowly release the pharmacological
agents so they can remain at the intended site of action in a therapeutic
concentration for a sufficient length of time.
Other Periodontal Services
D4910 periodontal maintenance
This procedure is instituted following periodontal therapy and continues
at varying intervals, determined by the clinical evaluation of the dentist,
for the life of the dentition or any implant replacements. It includes
of the bacterial plaque and calculus from supragingival and
subgingival regions, site specific scaling and root planing where indicated,
and polishing the teeth. If new or recurring periodontal disease appears,
additional diagnostic and treatment procedures must be considered.
D4920 unscheduled dressing change (by someone other than treating
dentist or their staff)
D4921 gingival irrigation with a medicinal agent – per quadrant
D4999 unspecified periodontal procedure, by report
Use for a procedure that is not adequately described by a code.
Describe the procedure.
Bulk discounts and
licensing options available.
Email SpecialOrdersPDS@ADA.org
to request a quote.
"It has new codes that we were not aware of and also helps
us see which codes are better to use for certain services.
You need it to properly submit the claims and be aware
of all the changes for the current year."
-Dr. Elham Morshedzadeh, Bellevue, WA
• 2 deleted codes
• 4 editorial changes
ORDER BY PHONE: 800.947.4746 6 7 ORDER ONLINE: ADASTORE.ORG
Chapter
5: D4000–D4999
Periodontics
Section
1. Code
on Dental
Procedures
and Nomenclature
CDT
2025
c
o
d
i
n g
CDT 2025 Coding Companion:
Training Guide for the Dental Team
The fundamental rule to apply in all coding situations is “code for
what you do.” The CDT 2025 Coding Companion can help you do just
that by walking staff through the steps needed to complete detailed
patient records and submit accurate claims. This instructional text
features more than 200 coding scenarios to provide you with step-
by-step examples for how to code different cases and treatments. It
includes examples of how to use new and revised codes, so no matter
the experience level, all coders will benefit from this 2025 edition.
For less experienced coding staff, the CDT 2025 Coding Companion
takes the stress out of coding with more than 270 questions and
answers to help prepare for any coding situation. Written by dental
coding experts and vetted by the ADA, the Coding Companion can be
trusted as the definitive source of coding information.
The CDT 2025 Coding Companion features:
• Descriptions and explanations of the code changes for 2025
• 200 coding scenarios and 270 questions and answers
• Key definitions and concepts for each category of service
• Numeric and alphabetic indices
J455BT Spiral-bound book +e-book, Approx. 432 pages
Members $69.95 Retail $109.95
Book ISBN: 978-1-68447-232-1 |e-book ISBN: 978-1-68447-233-8
N E W
CDT 2025: Current Dental Terminology
As the world changes and new technology and practices emerge,
the CDT Code evolves. Since 2020, there have been more than
200 changes to the CDT Code. It is important to be familiar with
CDT Code changes that dentists and staff need to more accurately
document and report the procedure delivered to a patient. Don’t risk
having claims rejected by getting caught with outdated information.
Accurate and detailed patient records are vital to the success of
your practice. CDT 2025: Current Dental Terminology gives you the
most current information needed to ensure your patient records are
correct and maximize reimbursement.
CDT 2025 changes include:
• 10 new codes
• 8 revisions
These codes are developed by the ADA and are the only
HIPAA-recognized code set for dentistry.
14 © 2024 American Dental Association • new procedure code s revision to a nomenclature or descriptor #Editorial
D1321 counseling for the control and prevention of adverse oral,
behavioral, and systemic health effects associated with
high-risk substance use
Counseling services may include patient education about adverse oral,
behavioral, and systemic effects associated with high-risk substance
use and administration routes. This includes ingesting, injecting, inhaling
and vaping. Substances used in a high-risk manner may include but are
not limited to alcohol, opioids, nicotine, cannabis, methamphetamine
and other pharmaceuticals or chemicals.
D1330 oral hygiene instructions
This may include instructions for home care. Examples include tooth
brushing technique, flossing, and use of special oral hygiene aids.
D1351 sealant – per tooth
Mechanically and/or chemically prepared enamel surface sealed to
prevent decay.
D1353 sealant repair – per tooth
D1352 preventive resin restoration in a moderate to high caries risk
patient – permanent tooth
Conservative restoration of an active cavitated lesion in a pit or fissure
that does not extend into dentin includes placement of a sealant in
any radiating non-carious fissures or pits.
D1354 application of caries arresting medicament – per toothto
Conservative treatment of an active, non-symptomatic carious lesion
by topical application of a caries arresting or inhibiting medicament
and without mechanical removal of sound tooth structure.
D1355 caries preventive medicament application – per tooth
For primary prevention or remineralization. Medicaments applied
do not include topical fluorides.
Space Maintenance (Passive Appliances)
Passive appliances are designed to prevent tooth movement.
D1510 space maintainer – fixed, unilateral – per quadrant
Excludes a distal shoe space maintainer.
D1516 space maintainer – fixed – bilateral, maxillary
D1517 space maintainer – fixed – bilateral, mandibular
200 real-life coding scenarios!
CDT 2025 features new and revised codes for:
• Administration of neuromodulators
• Administration of dermal fillers
• Removal of an indirect restoration on a natural tooth
• Replacement of an implant screw
• Partial extraction for immediate implant placement
• Placement of an interim direct restoration
• Repair of an implant/abutment supported prosthesis
In addition to providing the most up-to-date codes, CDT 2025
also includes access to the CDT e-book, mobile app and web app,
providing digital access to the full suite of CDT codes and descriptors.
You will also find ICD-10-CM codes for dental procedures, making
CDT 2025 the most valuable resource to meet your coding needs.
J025BTi Spiral-bound book +e-book +app, 194 pages
Members $94.95 Retail $139.95
Book ISBN: 978-1-68447-229-1 |e-book ISBN: 978-1-68447-231-4
J025i CDT 2025 App for iOS and Android |Members $89.99 Retail $89.99
© 2022 American Dental Association 139
Periodontics
Clinical Coding Scenario #2:
Periodontitis
A 49-year-old male patient presents for periodontal examination with a chief
complaint of sore and bleeding gums. His medical history is significant for type
II diabetes being treated with Metformin (glucophage) and hypertension, which
was being treated with a calcium channel blocker (nifedipine-adalat). He smokes
one pack of cigarettes a day. His last dental appointment was five years ago, and
there are heavy accumulations of plaque and calculus, both supra-gingival
and sub-gingival.
Since the amount of calculus and plaque prevented a periodontal evaluation
from being performed adequately, the patient was seen by the hygienist that
same day. Without using any anesthesia, she utilized an ultrasonic scaler to
debride supragingival calculus and plaque in all four quadrants. After reviewing
home care instructions and giving the patient chlorhexidine rinse, provided by
the office, the patient was scheduled to return in two weeks for a periodontal
evaluation and appropriate radiographic images.
How would these visits be coded?
Visit #1: Assessment and Debridement
D0191 assessment of a patient
D4355 full mouth debridement to enable a comprehensive oral
evaluation and diagnosis on a subsequent visit
D1330 oral hygiene instructions
D9630 drugs or medicaments dispensed in the office for home use
Visit #2: Evaluation, Diagnosis, and Treatment Planning
Two weeks later, the patient returned for radiographic images and a complete
periodontal evaluation.
The diagnosis is Stage III Grade C periodontitis with pocket depths ranging from
4 to 9 mm, furcation involvement, mobility, and localized recession. There are
interproximal papillae that exhibit swelling with a “granulated” surface appearance
to the soft tissue resembling hyperplasia possibly caused by the calcium channel-
blocking drug. Consultation with the patient’s internist to evaluate possibility
of changing the high blood pressure medication was done by the dentist.
Continued on next page
TABLE OF CONTENTS
SECTION 1 – THE CDT CODE: WHAT IT IS AND HOW TO USE IT
SECTION 2 – USING THE CDT CODE: DEFINITIONS AND KEY
CONCEPTS, CODING SCENARIOS AND CODING Q&A
CHAPTER 1 Diagnostic
CHAPTER 2 Preventive
CHAPTER 3 Restorative
CHAPTER 4 Endodontics
CHAPTER 5 Periodontics
CHAPTER 6 Prosthodontics, removable
CHAPTER 7 Maxillofacial Prosthetics
CHAPTER 8 Implant Services
CHAPTER 9 Prosthodontics, fixed
CHAPTER 10 Oral and Maxillofacial Surgery
CHAPTER 11 Orthodontics
CHAPTER 12 Adjunctive General Services
CHAPTER 13 Sleep Apnea Services
CHAPTER 14 Dental Benefits: What Every Dentist Should Know
SECTION 3 – APPENDICES
APPENDIX 1 Introduction to Medical Claim Form Completion
APPENDIX 2 CDT Code to ICD (Diagnosis) Code Crosswalk
(included in e-book)
APPENDIX 3 ADA Guide to Dental Procedures Reported with Area
of Oral Cavity on Tooth Anatomy (or Both) (included in e-book)
APPENDIX 4 CDT and ICD-10 Coding Recommendations
for Smoking Cessation (included in e-book)
APPENDIX 5 Understanding and Procedure Coding for
Patients with Special Health Care Needs (included in e-book)
Numeric Index by CDT Code, Alphabetic Index by Topic
© 2024 American Dental Association 35
V. Periodontics
in presence of generalized moderate or severe gingival
inflammation – full mouth, after oral evaluation
The removal of plaque, calculus and stains from supra- and sub-gingival tooth
surfaces when there is generalized moderate or severe gingival inflammation
in the of periodontitis. It is indicated for patients who have
swollen, inflamed gingiva, generalized suprabony pockets, and moderate
severe bleeding on probing. Should not be reported in conjunction
scaling and root planing, or debridement procedures.
D4355 full mouth debridement to enable a comprehensive periodontal
evaluation and diagnosis on a subsequent visit
localized delivery of antimicrobial agents via a controlled release
into diseased crevicular tissue, per tooth
FDA approved subgingival delivery devices containing antimicrobial
medication(s) are inserted into periodontal pockets to suppress the
pathogenic microbiota. These devices slowly release the pharmacological
agents so they can remain at the intended site of action in a therapeutic
concentration for a sufficient length of time.
Other Periodontal Services
D4910 periodontal maintenance
This procedure is instituted following periodontal therapy and continues
at varying intervals, determined by the clinical evaluation of the dentist,
for the life of the dentition or any implant replacements. It includes
of the bacterial plaque and calculus from supragingival and
subgingival regions, site specific scaling and root planing where indicated,
and polishing the teeth. If new or recurring periodontal disease appears,
additional diagnostic and treatment procedures must be considered.
D4920 unscheduled dressing change (by someone other than treating
dentist or their staff)
D4921 gingival irrigation with a medicinal agent – per quadrant
D4999 unspecified periodontal procedure, by report
Use for a procedure that is not adequately described by a code.
Describe the procedure.
Bulk discounts and
licensing options available.
Email SpecialOrdersPDS@ADA.org
to request a quote.
"It has new codes that we were not aware of and also helps
us see which codes are better to use for certain services.
You need it to properly submit the claims and be aware
of all the changes for the current year."
-Dr. Elham Morshedzadeh, Bellevue, WA
• 2 deleted codes
• 4 editorial changes
ORDER BY PHONE: 800.947.4746 6 7 ORDER ONLINE: ADASTORE.ORG
Chapter
5: D4000–D4999
Periodontics
Section
1. Code
on Dental
Procedures
and Nomenclature
CDT
2025
c
o
d
i
n g
