Martin Ahn, M.D.
NPI 1649342171 · Family Medicine Physician · Buena Park, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Ahn, M.D. is a Family Medicine Physician provider in Buena Park, CA (NPI 1649342171).
Provider details
- NPI number
- 1649342171
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A85576 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,175 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 661 | $118 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 379 | $15 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 223 | $9 |
| Automated Urinalysis Test81003 | 128 | $2 |
| Creatinine Level to Test for Kidney Function Or Muscle Injury82570 | 118 | $5 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 107 | $136 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 139 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 576 | 173 |
| Amlodipine Besylate | 558 | 162 |
| Atorvastatin Calcium | 496 | 148 |
| Metformin Hcl | 423 | 114 |
| Icosapent Ethylbrand: Vascepa | 268 | 61 |
| Dapagliflozin Propanediolbrand: Farxiga | 198 | 47 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,515 across 75 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
- 2006-11-13
- Last updated
- 2018-07-20
Frequently asked questions
- What is Martin Ahn's NPI number?
- Martin Ahn's National Provider Identifier (NPI) is 1649342171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Ahn's specialty?
- Martin Ahn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Ahn located?
- Martin Ahn's practice location on file with NPPES is 6301 Beach Blvd, Buena Park, CA 90621.
- What is Martin Ahn's phone number?
- The practice phone number listed in the NPPES registry for Martin Ahn is (714) 525-9900.
- Does Martin Ahn accept Medicare?
- Martin Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Ahn's NPI active?
- Yes — Martin Ahn's NPI (1649342171) is active in the NPPES registry as of the last update on 2018-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.