Douglas Zakolski, D.O.
NPI 1659356400 · Internal Medicine Physician · Southgate, MI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Zakolski, D.O. is a Internal Medicine Physician provider in Southgate, MI (NPI 1659356400).
Provider details
- NPI number
- 1659356400
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5101012105 (MI)
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
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
570 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 | 356 | $90 |
| Hemoglobin A1c Level83036 | 77 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 59 | $115 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 32 | $65 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 23 | $11 |
| Administration of Influenza Virus VaccineG0008 | 12 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 174 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 516 | 161 |
| Alprazolam | 486 | 64 |
| Amlodipine Besylate | 381 | 98 |
| Lisinopril | 371 | 97 |
| Levothyroxine Sodium | 347 | 92 |
| Losartan Potassium | 291 | 86 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (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
- 2005-12-14
- Last updated
- 2020-10-22
- Certified
- 2020-10-22
Frequently asked questions
- What is Douglas Zakolski's NPI number?
- Douglas Zakolski's National Provider Identifier (NPI) is 1659356400, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Zakolski's specialty?
- Douglas Zakolski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Zakolski located?
- Douglas Zakolski's practice location on file with NPPES is 14319 Dix Toledo Rd, Southgate, MI 48195-2506.
- What is Douglas Zakolski's phone number?
- The practice phone number listed in the NPPES registry for Douglas Zakolski is (734) 285-0677.
- Does Douglas Zakolski accept Medicare?
- Douglas Zakolski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Zakolski's NPI active?
- Yes — Douglas Zakolski's NPI (1659356400) is active in the NPPES registry as of the last update on 2020-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.