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Grace Mahowald, MD, PHD
NPI 1659665685 · Clinical Pathology Physician · Boston, MA
Grace Mahowald, MD, PHD is a Clinical Pathology Physician provider in Boston, MA (NPI 1659665685).
Provider details
- NPI number
- 1659665685
- Entity type
- Individual
- Primary specialty
- Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- L-247754 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
Massachusetts General Hospital
55 Fruit Street
Boston, MA 02114
Phone: (617) 726-2865
Approximate (ZIP-level) locationGet directions
Mailing address
Massachusetts General Hospital
Boston, MA 02114
Registry dates
- Enumerated
- 2011-06-07
- Last updated
- 2019-10-17
Frequently asked questions
- What is Grace Mahowald's NPI number?
- Grace Mahowald's National Provider Identifier (NPI) is 1659665685, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace Mahowald's specialty?
- Grace Mahowald is listed in the NPPES registry with a primary specialty of Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Grace Mahowald located?
- Grace Mahowald's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Grace Mahowald's phone number?
- The practice phone number listed in the NPPES registry for Grace Mahowald is (617) 726-2865.
- Is Grace Mahowald's NPI active?
- Yes — Grace Mahowald's NPI (1659665685) is active in the NPPES registry as of the last update on 2019-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.