Marlene Millen, MD
NPI 1225101355 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marlene Millen, MD is a Internal Medicine Physician provider in San Diego, CA (NPI 1225101355).
Provider details
- NPI number
- 1225101355
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A82259 (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
19 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
743 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 239 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 228 | $87 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 79 | $49 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $41 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 47 | $109 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 72 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 150 | 37 |
| Atorvastatin Calcium | 144 | 41 |
| Levothyroxine Sodium | 141 | 39 |
| Rosuvastatin Calcium | 140 | 36 |
| Gabapentin | 109 | 21 |
| Metoprolol Succinate | 92 | 24 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marlene Millen's NPI number?
- Marlene Millen's National Provider Identifier (NPI) is 1225101355, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marlene Millen's specialty?
- Marlene Millen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marlene Millen located?
- Marlene Millen's practice location on file with NPPES is 200 W Arbor Dr Dept 8201, San Diego, CA 92103-8201.
- What is Marlene Millen's phone number?
- The practice phone number listed in the NPPES registry for Marlene Millen is (619) 471-9250.
- Does Marlene Millen accept Medicare?
- Marlene Millen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marlene Millen's NPI active?
- Yes — Marlene Millen's NPI (1225101355) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.