James Macer, MD
NPI 1134129711 · Obstetrics & Gynecology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Macer, MD is a Obstetrics & Gynecology Physician provider in Pasadena, CA (NPI 1134129711).
Provider details
- NPI number
- 1134129711
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G42123 (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
20 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
608 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 161 | $98 |
| Stool Analysis for Blood, By Peroxidase Activity82272 | 111 | $4 |
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 102 | $42 |
| Screening Papanicolaou Smear; Obtaining, Preparing and Conveyance of Cervical Or Vaginal Smear to LaboratoryQ0091 | 95 | $49 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 48 | $62 |
| Urinalysis, Manual Test81002 | 38 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 90 | 27 |
| Estradiolbrand: Estradiol (twice Weekly) | 71 | 19 |
| Progesterone, Micronizedbrand: Progesterone | 37 | — |
| Estrogens, Conjugatedbrand: Premarin | 37 | 20 |
| Levothyroxine Sodium | 35 | 11 |
| Levothyroxine Sodiumbrand: Synthroid | 26 | — |
| Zolpidem Tartrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$591 across 26 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
- 2005-07-26
- Last updated
- 2011-01-13
Frequently asked questions
- What is James Macer's NPI number?
- James Macer's National Provider Identifier (NPI) is 1134129711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Macer's specialty?
- James Macer is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is James Macer located?
- James Macer's practice location on file with NPPES is 10 Congress St, Pasadena, CA 91105-3023.
- What is James Macer's phone number?
- The practice phone number listed in the NPPES registry for James Macer is (626) 449-6223.
- Does James Macer accept Medicare?
- James Macer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Macer's NPI active?
- Yes — James Macer's NPI (1134129711) is active in the NPPES registry as of the last update on 2011-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.