John Knapp, M.D.
NPI 1811997216 · Specialist · Roseville, MI
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Knapp, M.D. is a Specialist provider in Roseville, MI (NPI 1811997216).
Provider details
- NPI number
- 1811997216
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 051917 (MI)
Specialties & taxonomies
Other Service Providers
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,144 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 194 | $137 |
| Colorectal Cancer Screening; Fecal Occult Blood Test, Immunoassay, 1-3 SimultaneousG0328 | 135 | $18 |
| Urinalysis, Manual Test81002 | 132 | $3 |
| Screening 3d Breast Mammography77063 | 107 | $55 |
| Screening Mammography77067 | 107 | $134 |
| Pelvic Exam99459 | 103 | $23 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Nystatin/Triamcinolone Acetbrand: Nystatin-Triamcinolone | 70 | 43 |
| Estradiol | 43 | 19 |
| Ibandronate Sodium | 38 | 12 |
| Fluconazole | 27 | 25 |
| Estradiolbrand: Estradiol (twice Weekly) | 25 | — |
| Valacyclovir Hclbrand: Valacyclovir | 24 | — |
| Solifenacin Succinate | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$500 across 25 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
- 2005-07-28
- Last updated
- 2014-03-11
Frequently asked questions
- What is John Knapp's NPI number?
- John Knapp's National Provider Identifier (NPI) is 1811997216, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Knapp's specialty?
- John Knapp is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is John Knapp located?
- John Knapp's practice location on file with NPPES is 29751 Little Mack Ave, Roseville, MI 48066-2238.
- What is John Knapp's phone number?
- The practice phone number listed in the NPPES registry for John Knapp is (586) 415-6200.
- Does John Knapp accept Medicare?
- John Knapp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Knapp's NPI active?
- Yes — John Knapp's NPI (1811997216) is active in the NPPES registry as of the last update on 2014-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.