IndividualActive
John Jao, M.D.
NPI 1538359674 · Internal Medicine Physician · Boston, MA
John Jao, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1538359674).
Provider details
- NPI number
- 1538359674
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 31168 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
110 Chauncy St
Boston, MA 02111-1720
Phone: (617) 654-7535
Street-level locationGet directions
Mailing address
224 Ridgeway Rd
Weston, MA 02493-2707
Registry dates
- Enumerated
- 2007-07-25
- Last updated
- 2007-07-25
Frequently asked questions
- What is John Jao's NPI number?
- John Jao's National Provider Identifier (NPI) is 1538359674, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Jao's specialty?
- John Jao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Jao located?
- John Jao's practice location on file with NPPES is 110 Chauncy St, Boston, MA 02111-1720.
- What is John Jao's phone number?
- The practice phone number listed in the NPPES registry for John Jao is (617) 654-7535.
- Is John Jao's NPI active?
- Yes — John Jao's NPI (1538359674) is active in the NPPES registry as of the last update on 2007-07-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.