Samuel Stoyak, M.D.
NPI 1588906994 · Internal Medicine Physician · Frederick, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samuel Stoyak, M.D. is a Internal Medicine Physician provider in Frederick, MD (NPI 1588906994).
Provider details
- NPI number
- 1588906994
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 042.0013430 (VT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
16 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,470 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 464 | $110 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 331 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 247 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 122 | $129 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 93 | $152 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 70 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 187 | 87 |
| Amlodipine Besylate | 176 | 63 |
| Levothyroxine Sodium | 137 | 58 |
| Losartan Potassium | 113 | 48 |
| Rosuvastatin Calcium | 109 | 43 |
| Metformin Hclbrand: Metformin Hcl Er | 89 | 33 |
Practice location
Mailing address
Additional practice locations (15)
- 1194 Dutchmans Creek DrBrunswick, MD 21716-9786Phone: (240) 215-6310
- 16403 Old Emmitsburg RdEmmitsburg, MD 21727-8929Phone: (240) 215-6310
- 75 Thomas Johnson DrFrederick, MD 21702-4895Phone: (240) 215-6310
- 230 W Patrick StFrederick, MD 21701-6945Phone: (240) 215-6310
- 194 Thomas Johnson DrFrederick, MD 21702-4679Phone: (240) 215-6310
- 400 W 7th StFrederick, MD 21701-4506Phone: (240) 215-6310
- 7211 Bank CtFrederick, MD 21703-8483Phone: (240) 215-6310
- 501 W 7th StFrederick, MD 21701-4586Phone: (240) 215-6310
- 1 Frederick Health WayFrederick, MD 21701-9435Phone: (240) 215-6310
Registry dates
- Enumerated
- 2013-03-24
- Last updated
- 2023-08-21
- Certified
- 2023-08-21
Frequently asked questions
- What is Samuel Stoyak's NPI number?
- Samuel Stoyak's National Provider Identifier (NPI) is 1588906994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samuel Stoyak's specialty?
- Samuel Stoyak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Samuel Stoyak located?
- Samuel Stoyak's practice location on file with NPPES is 1562 Opossumtown Pike, Frederick, MD 21702-4920.
- What is Samuel Stoyak's phone number?
- The practice phone number listed in the NPPES registry for Samuel Stoyak is (240) 215-6310.
- Does Samuel Stoyak accept Medicare?
- Samuel Stoyak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samuel Stoyak's NPI active?
- Yes — Samuel Stoyak's NPI (1588906994) is active in the NPPES registry as of the last update on 2023-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.