Leigh Seamon, D.O.
NPI 1821147422 · Gynecologic Oncology Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Gynecological Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leigh Seamon, D.O. is a Gynecologic Oncology Physician provider in Grand Rapids, MI (NPI 1821147422).
Provider details
- NPI number
- 1821147422
- Entity type
- Individual
- Primary specialty
- Gynecologic Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 34.008774 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
447 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 86 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 81 | $8 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 68 | $172 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 64 | $117 |
| Immunologic Analysis for Detection of Tumor Antigen, Quantitative; Ca 12586304 | 61 | $20 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 56 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prochlorperazine Maleate | 26 | 14 |
| Dexamethasone | 21 | — |
| Ondansetron Hcl | 21 | — |
| Prednisone | 17 | — |
| Olanzapine | 17 | — |
| Apixabanbrand: Eliquis | 16 | — |
| Niraparib Tosylatebrand: Zejula | 15 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,043 across 9 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
- 2007-01-10
- Last updated
- 2026-04-02
- Certified
- 2026-04-02
Frequently asked questions
- What is Leigh Seamon's NPI number?
- Leigh Seamon's National Provider Identifier (NPI) is 1821147422, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leigh Seamon's specialty?
- Leigh Seamon is listed in the NPPES registry with a primary specialty of Gynecologic Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Leigh Seamon located?
- Leigh Seamon's practice location on file with NPPES is 145 Michigan St Ne, Grand Rapids, MI 49503-2562.
- What is Leigh Seamon's phone number?
- The practice phone number listed in the NPPES registry for Leigh Seamon is (616) 486-6000.
- Does Leigh Seamon accept Medicare?
- Leigh Seamon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leigh Seamon's NPI active?
- Yes — Leigh Seamon's NPI (1821147422) is active in the NPPES registry as of the last update on 2026-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.