IndividualActive
Charles Grassie, M.D.
NPI 1649226119 · Emergency Medicine Physician · Howell, MI
Charles Grassie, M.D. is a Emergency Medicine Physician provider in Howell, MI (NPI 1649226119).
Provider details
- NPI number
- 1649226119
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 048131 (MI)
Specialties & taxonomies
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
620 Byron Rd
Howell, MI 48843-1002
Phone: (517) 545-6000
Street-level locationGet directions
Mailing address
2000 Green Rd
Ann Arbor, MI 48105-1598
Registry dates
- Enumerated
- 2006-05-26
- Last updated
- 2011-01-28
Frequently asked questions
- What is Charles Grassie's NPI number?
- Charles Grassie's National Provider Identifier (NPI) is 1649226119, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Grassie's specialty?
- Charles Grassie is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Grassie located?
- Charles Grassie's practice location on file with NPPES is 620 Byron Rd, Howell, MI 48843-1002.
- What is Charles Grassie's phone number?
- The practice phone number listed in the NPPES registry for Charles Grassie is (517) 545-6000.
- Is Charles Grassie's NPI active?
- Yes — Charles Grassie's NPI (1649226119) is active in the NPPES registry as of the last update on 2011-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.