Medical Office of John Vassallo MD PLLC
NPI 1487712121 · Internal Medicine Physician · Howell, MI
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Medical Office of John Vassallo MD PLLC is a Internal Medicine Physician organization in Howell, MI (NPI 1487712121).
Provider details
- NPI number
- 1487712121
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- John Vassallo, Owner(517) 548-0010
- License
- 4301078585 (MI)
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
19 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
- 2006-12-05
- Last updated
- 2026-04-13
- Certified
- 2026-04-13
Frequently asked questions
- What is Medical Office of John Vassallo MD PLLC's NPI number?
- Medical Office of John Vassallo MD PLLC's National Provider Identifier (NPI) is 1487712121, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Medical Office of John Vassallo MD PLLC?
- Medical Office of John Vassallo MD PLLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Medical Office of John Vassallo MD PLLC located?
- Medical Office of John Vassallo MD PLLC's practice location on file with NPPES is 4354 E Grand River Ave, Howell, MI 48843-8554.
- What is Medical Office of John Vassallo MD PLLC's phone number?
- The practice phone number listed in the NPPES registry for Medical Office of John Vassallo MD PLLC is (517) 540-0709.
- Does Medical Office of John Vassallo MD PLLC accept Medicare?
- Medical Office of John Vassallo MD PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Medical Office of John Vassallo MD PLLC?
- The authorized official listed on Medical Office of John Vassallo MD PLLC's NPPES record is John Vassallo, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Medical Office of John Vassallo MD PLLC's NPI active?
- Yes — Medical Office of John Vassallo MD PLLC's NPI (1487712121) is active in the NPPES registry as of the last update on 2026-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.