Nathan Griswold, PAC
NPI 1336305150 · Physician Assistant · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Griswold, PAC is a Physician Assistant provider in Grand Rapids, MI (NPI 1336305150).
Provider details
- NPI number
- 1336305150
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Male
- Sole proprietor
- No
- License
- 5601005279 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amiodarone Hcl | 31 | 31 |
| Methocarbamol | 23 | 23 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 22 | — |
| Oxycodone Hcl | 20 | 19 |
| Metoprolol Tartrate | 19 | 12 |
| Furosemide | 16 | 15 |
| Potassium Chloride | 16 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 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
Registry dates
- Enumerated
- 2008-07-31
- Last updated
- 2022-10-25
- Certified
- 2022-10-25
Frequently asked questions
- What is Nathan Griswold's NPI number?
- Nathan Griswold's National Provider Identifier (NPI) is 1336305150, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Griswold's specialty?
- Nathan Griswold is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Nathan Griswold located?
- Nathan Griswold's practice location on file with NPPES is 100 Michigan St Ne, Grand Rapids, MI 49503-2560.
- What is Nathan Griswold's phone number?
- The practice phone number listed in the NPPES registry for Nathan Griswold is (616) 459-7258.
- Does Nathan Griswold accept Medicare?
- Nathan Griswold is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Griswold's NPI active?
- Yes — Nathan Griswold's NPI (1336305150) is active in the NPPES registry as of the last update on 2022-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.