What is William Macomber's NPI number?

William Macomber's National Provider Identifier (NPI) is 1033165717, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Macomber's specialty?

William Macomber is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).

Where is William Macomber located?

William Macomber's practice location on file with NPPES is 1 Widger Rd, Marblehead, MA 01945.

What is William Macomber's phone number?

The practice phone number listed in the NPPES registry for William Macomber is (781) 631-2577.

Is William Macomber's NPI active?

Yes — William Macomber's NPI (1033165717) is active in the NPPES registry as of the last update on 2007-08-11.

IndividualActive

William Macomber, MD

NPI 1033165717 · Internal Medicine Physician · Marblehead, MA

William Macomber, MD is a Internal Medicine Physician provider in Marblehead, MA (NPI 1033165717).

Provider details

NPI number: 1033165717
Entity type: Individual
Primary specialty: Internal Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 45330 (MA)

Specialties & taxonomies

Internal Medicine PhysicianPrimary207R00000XLicense 45330 (MA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

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

1 Widger Rd

Ste 204

Marblehead, MA 01945

Phone: (781) 631-2577

Fax: (781) 631-5405

Street-level locationGet directions

More MA providers

Mailing address

Po Box 930

Salem, MA 01970

Enumerated: 2006-05-25
Last updated: 2007-08-11

Frequently asked questions

What is William Macomber's NPI number?: William Macomber's National Provider Identifier (NPI) is 1033165717, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Macomber's specialty?: William Macomber is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
Where is William Macomber located?: William Macomber's practice location on file with NPPES is 1 Widger Rd, Marblehead, MA 01945.
What is William Macomber's phone number?: The practice phone number listed in the NPPES registry for William Macomber is (781) 631-2577.
Is William Macomber's NPI active?: Yes — William Macomber's NPI (1033165717) is active in the NPPES registry as of the last update on 2007-08-11.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.