Kathryn Grossman, MD
NPI 1780658146 · Internal Medicine Physician · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Grossman, MD is a Internal Medicine Physician provider in Kalamazoo, MI (NPI 1780658146).
Provider details
- NPI number
- 1780658146
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- KG080105 (MI)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
178 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 107 | $75 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 53 | $126 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 18 | $110 |
Typical Medicare-allowed amounts for these services range $75–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$115 across 7 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)
- 13320 N Boulevard StVicksburg, MI 49097-1514Phone: (269) 649-2012Fax: (269) 649-3752
Registry dates
- Enumerated
- 2006-02-14
- Last updated
- 2023-11-27
- Certified
- 2020-10-09
Frequently asked questions
- What is Kathryn Grossman's NPI number?
- Kathryn Grossman's National Provider Identifier (NPI) is 1780658146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Grossman's specialty?
- Kathryn Grossman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Grossman located?
- Kathryn Grossman's practice location on file with NPPES is 601 John St, Kalamazoo, MI 49007.
- What is Kathryn Grossman's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Grossman is (269) 341-8481.
- Does Kathryn Grossman accept Medicare?
- Kathryn Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Grossman's NPI active?
- Yes — Kathryn Grossman's NPI (1780658146) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.