Douglas Diemer, PA-C
NPI 1518037878 · Physician Assistant · Portage, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Diemer, PA-C is a Physician Assistant provider in Portage, MI (NPI 1518037878).
Provider details
- NPI number
- 1518037878
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- 5601004477 (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
19 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$36 across 1 record (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
- 2006-11-08
- Last updated
- 2022-08-30
- Certified
- 2022-08-30
Frequently asked questions
- What is Douglas Diemer's NPI number?
- Douglas Diemer's National Provider Identifier (NPI) is 1518037878, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Diemer's specialty?
- Douglas Diemer is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Douglas Diemer located?
- Douglas Diemer's practice location on file with NPPES is 3200 W Centre Ave, Portage, MI 49024-4889.
- What is Douglas Diemer's phone number?
- The practice phone number listed in the NPPES registry for Douglas Diemer is (269) 324-0799.
- Does Douglas Diemer accept Medicare?
- Douglas Diemer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Diemer's NPI active?
- Yes — Douglas Diemer's NPI (1518037878) is active in the NPPES registry as of the last update on 2022-08-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.