Mac Chamberlin, MD
NPI 1881085439 · Emergency Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mac Chamberlin, MD is a Emergency Medicine Physician provider in Oakland, CA (NPI 1881085439).
Provider details
- NPI number
- 1881085439
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-02-17
- Last updated
- 2020-01-30
- Certified
- 2020-01-30
Frequently asked questions
- What is Mac Chamberlin's NPI number?
- Mac Chamberlin's National Provider Identifier (NPI) is 1881085439, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mac Chamberlin's specialty?
- Mac Chamberlin is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mac Chamberlin located?
- Mac Chamberlin's practice location on file with NPPES is 1411 E 31st St, Oakland, CA 94602-1018.
- What is Mac Chamberlin's phone number?
- The practice phone number listed in the NPPES registry for Mac Chamberlin is (585) 473-2200.
- Does Mac Chamberlin accept Medicare?
- Mac Chamberlin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mac Chamberlin's NPI active?
- Yes — Mac Chamberlin's NPI (1881085439) is active in the NPPES registry as of the last update on 2020-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.