Stephen Markowski, AGPCNP
NPI 1366024523 · Nurse Practitioner · Waltham, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Markowski, AGPCNP is a Nurse Practitioner provider in Waltham, MA (NPI 1366024523).
Provider details
- NPI number
- 1366024523
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AGPCNP
- Sex
- Male
- Sole proprietor
- Yes
- License
- 95015353 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
5 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
816 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 333 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 306 | $119 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 77 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 60 | $84 |
| Blood Test, Clotting Time85610 | 40 | $4 |
Typical Medicare-allowed amounts for these services range $4–$119 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 625 | 299 |
| Apixabanbrand: Eliquis | 468 | 168 |
| Atorvastatin Calcium | 445 | 223 |
| Amlodipine Besylate | 296 | 148 |
| Losartan Potassium | 240 | 113 |
| Lisinopril | 217 | 101 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$91 across 4 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
- 2021-04-26
- Last updated
- 2026-05-12
- Certified
- 2026-05-12
Frequently asked questions
- What is Stephen Markowski's NPI number?
- Stephen Markowski's National Provider Identifier (NPI) is 1366024523, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Markowski's specialty?
- Stephen Markowski is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephen Markowski located?
- Stephen Markowski's practice location on file with NPPES is 281 Winter St Fl 2, Waltham, MA 02451-8740.
- What is Stephen Markowski's phone number?
- The practice phone number listed in the NPPES registry for Stephen Markowski is (781) 373-2940.
- Does Stephen Markowski accept Medicare?
- Stephen Markowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Markowski's NPI active?
- Yes — Stephen Markowski's NPI (1366024523) is active in the NPPES registry as of the last update on 2026-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.