Caitlin Macmillen, DO
NPI 1518321629 · Family Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caitlin Macmillen, DO is a Family Medicine Physician provider in San Diego, CA (NPI 1518321629).
Provider details
- NPI number
- 1518321629
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A16037 (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
10 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
567 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 | 152 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 117 | $84 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 101 | $105 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 69 | $112 |
| Osteopathic Manipulative Treatment, 5-6 Body Regions98927 | 68 | $62 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 69 | 23 |
| Losartan Potassium | 62 | 20 |
| Gabapentin | 60 | 15 |
| Levothyroxine Sodium | 57 | 15 |
| Rosuvastatin Calcium | 38 | 12 |
| Amlodipine Besylate | 28 | 14 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-06
- Last updated
- 2019-09-25
Frequently asked questions
- What is Caitlin Macmillen's NPI number?
- Caitlin Macmillen's National Provider Identifier (NPI) is 1518321629, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caitlin Macmillen's specialty?
- Caitlin Macmillen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caitlin Macmillen located?
- Caitlin Macmillen's practice location on file with NPPES is 200 West Arbor Drive, San Diego, CA 92103-8809.
- What is Caitlin Macmillen's phone number?
- The practice phone number listed in the NPPES registry for Caitlin Macmillen is (615) 543-2165.
- Does Caitlin Macmillen accept Medicare?
- Caitlin Macmillen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caitlin Macmillen's NPI active?
- Yes — Caitlin Macmillen's NPI (1518321629) is active in the NPPES registry as of the last update on 2019-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.