John Mayfield, MD
NPI 1669030722 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Mayfield, MD is a Internal Medicine Physician provider in Boston, MA (NPI 1669030722).
Provider details
- NPI number
- 1669030722
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1017847 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$45 across 2 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
Additional practice locations (1)
- 701 Grove RdGreenville, SC 29605-4210Phone: (864) 455-7882
Registry dates
- Enumerated
- 2019-06-04
- Last updated
- 2024-06-27
- Certified
- 2024-06-27
Frequently asked questions
- What is John Mayfield's NPI number?
- John Mayfield's National Provider Identifier (NPI) is 1669030722, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Mayfield's specialty?
- John Mayfield is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Mayfield located?
- John Mayfield's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is John Mayfield's phone number?
- The practice phone number listed in the NPPES registry for John Mayfield is (617) 726-8323.
- Does John Mayfield accept Medicare?
- John Mayfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Mayfield's NPI active?
- Yes — John Mayfield's NPI (1669030722) is active in the NPPES registry as of the last update on 2024-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.