Maryellen Rhinehart, MD
NPI 1134193857 · Internal Medicine Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maryellen Rhinehart, MD is a Internal Medicine Physician provider in Cambridge, MA (NPI 1134193857).
Provider details
- NPI number
- 1134193857
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 76897 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2006-02-17
- Last updated
- 2012-04-05
Frequently asked questions
- What is Maryellen Rhinehart's NPI number?
- Maryellen Rhinehart's National Provider Identifier (NPI) is 1134193857, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maryellen Rhinehart's specialty?
- Maryellen Rhinehart is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maryellen Rhinehart located?
- Maryellen Rhinehart's practice location on file with NPPES is 77 Mass Ave, Cambridge, MA 02139-4301.
- What is Maryellen Rhinehart's phone number?
- The practice phone number listed in the NPPES registry for Maryellen Rhinehart is (617) 253-7802.
- Does Maryellen Rhinehart accept Medicare?
- Maryellen Rhinehart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maryellen Rhinehart's NPI active?
- Yes — Maryellen Rhinehart's NPI (1134193857) is active in the NPPES registry as of the last update on 2012-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.