Mark Adrian, M.D.
NPI 1003879438 · Internal Medicine Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Adrian, M.D. is a Internal Medicine Physician provider in La Jolla, CA (NPI 1003879438).
Provider details
- NPI number
- 1003879438
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G78895 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
909 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 491 | $176 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 364 | $120 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 54 | $118 |
Typical Medicare-allowed amounts for these services range $118–$176 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 70 | 11 |
| Atorvastatin Calcium | 68 | 19 |
| Amlodipine Besylate | 66 | 16 |
| Levothyroxine Sodium | 52 | 12 |
| Losartan Potassium | 47 | — |
| Alprazolam | 33 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-07
- Last updated
- 2010-09-21
Frequently asked questions
- What is Mark Adrian's NPI number?
- Mark Adrian's National Provider Identifier (NPI) is 1003879438, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Adrian's specialty?
- Mark Adrian is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Adrian located?
- Mark Adrian's practice location on file with NPPES is 9850 Genesee Ave, La Jolla, CA 92037-1224.
- What is Mark Adrian's phone number?
- The practice phone number listed in the NPPES registry for Mark Adrian is (858) 202-0011.
- Does Mark Adrian accept Medicare?
- Mark Adrian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Adrian's NPI active?
- Yes — Mark Adrian's NPI (1003879438) is active in the NPPES registry as of the last update on 2010-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.