John Combs, DDS, MD
NPI 1538535901 · Dentist · Bethesda, MD
Enrolled with Medicare as Order and Referring Only - Oral Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Combs, DDS, MD is a Dentist provider in Bethesda, MD (NPI 1538535901).
Provider details
- NPI number
- 1538535901
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- DDS, MD
- Sex
- Male
- Sole proprietor
- No
- License
- 31272 (TX)
Specialties & taxonomies
Dental Providers
Dental Providers
Dental Providers
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 24 | 21 |
| Chlorhexidine Gluconate | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-08-19
- Last updated
- 2022-09-28
- Certified
- 2022-09-28
Frequently asked questions
- What is John Combs's NPI number?
- John Combs's National Provider Identifier (NPI) is 1538535901, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Combs's specialty?
- John Combs is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is John Combs located?
- John Combs's practice location on file with NPPES is 8901 Rockville Pike, Bethesda, MD 20889-0001.
- What is John Combs's phone number?
- The practice phone number listed in the NPPES registry for John Combs is (301) 295-4340.
- Does John Combs accept Medicare?
- John Combs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Combs's NPI active?
- Yes — John Combs's NPI (1538535901) is active in the NPPES registry as of the last update on 2022-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.