Mark Grathwohl, M.D.
NPI 1386617363 · Specialist · Mount Kisco, NY
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Grathwohl, M.D. is a Specialist provider in Mount Kisco, NY (NPI 1386617363).
Provider details
- NPI number
- 1386617363
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 172619-1 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
583 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 349 | $40 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 55 | $29 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 50 | $88 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 41 | $30 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 35 | $30 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 28 | $37 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-09
- Last updated
- 2013-12-31
Frequently asked questions
- What is Mark Grathwohl's NPI number?
- Mark Grathwohl's National Provider Identifier (NPI) is 1386617363, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Grathwohl's specialty?
- Mark Grathwohl is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mark Grathwohl located?
- Mark Grathwohl's practice location on file with NPPES is 400 E Main St, Mount Kisco, NY 10549-3417.
- What is Mark Grathwohl's phone number?
- The practice phone number listed in the NPPES registry for Mark Grathwohl is (845) 562-7995.
- Does Mark Grathwohl accept Medicare?
- Mark Grathwohl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Grathwohl's NPI active?
- Yes — Mark Grathwohl's NPI (1386617363) is active in the NPPES registry as of the last update on 2013-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.