Dr. Douglas John Zakolski, DO
- Medicare services, 2024
- 570
- Medicare patients, 2024
- 164
- Part D claims, 2024
- 11,750
- Hospital affiliations
- 5
- Industry payments
- $2,946
- Practice address
- 14319 Dix Toledo Hwy, Southgate, MI 48195
- Practice phone
- Call (313) 593-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oakwood Ambulatory
Southgate, Michigan
Find Dr. Zakolski's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Douglas John Zakolski is an internist in Southgate, Michigan
Dr. Zakolski practices at Oakwood Ambulatory in Southgate, Michigan.
Dr. Zakolski's NPI, 1659356400, was assigned on December 14, 2005. Dr. Zakolski graduated from Michigan State University College of Osteopathic Medicine in 1983. Dr. Zakolski holds Michigan license 5101012105.
- NPI
- 1659356400NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638365497
- NPI enumeration date
- December 14, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (313) 593-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas John Zakolski practices at Oakwood Ambulatory in Southgate, Michigan
Dr. Zakolski's primary practice is Oakwood Ambulatory, at 14319 Dix Toledo Hwy, Southgate, MI 48195 in Wayne County. The practice phone is (313) 593-7000.
- Oakwood Ambulatory14319 Dix Toledo Hwy, Southgate, MI 48195 · Wayne CountyPhone(313) 593-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Douglas John Zakolski is affiliated with 11 sites of care and 3 medical groups
Dr. Zakolski's primary practice is Oakwood Ambulatory in Southgate, Michigan. Dr. Zakolski is also affiliated with Corewell Health William Beaumont University Hospital. The medical group on file is Medical Education Associates. Dmand AI also links Dr. Zakolski to 4 more hospitals, 3 group practices and clinics, 2 home health agencies and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Douglas John Zakolski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zakolski practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oakwood Ambulatory | Available with a free account |
| +10 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas John Zakolski is one of 4,804 internists in Michigan
Internal medicine is Dr. Zakolski's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Zakolski is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. Zakolski
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Douglas John Zakolski billed Medicare for 570 services in 2024
CMS data shows 570 Medicare services from Dr. Zakolski across 7 procedure codes in 2024, for 164 Medicare patients. Medicare paid $21,520 for them. Every service was in an office.
Dr. Zakolski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6262024: 44729%
- Lab and pathology
- 2023: 482024: 7760%
- Tests and treatments
- 2023: 462024: 2350%
- Other services
- 2023: 432024: 2347%
Dr. Zakolski compared with the Michigan median for internists, 2024
- Dr. Zakolski
- Michigan median
- Medicare services
- 570vs 42335% above
- Medicare patients
- 164vs 159Close to median
- Part D claims
- 10,888vs 31434.7 times
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. Zakolski's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zakolski and other internists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas John Zakolski treated 164 Medicare patients in 2024, average age 69
CMS counts 164 Medicare patients who saw Dr. Zakolski in 2024. The largest group is 65 to 74, with 79 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.23, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zakolski's median patient age at 61, with 44% women.
Dr. Zakolski's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Zakolski's Medicare patients by sex, 2024
- Women7848%
- Men8652%
Chronic conditions among Dr. Zakolski's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Diabetes38%
- Anxiety37%
- COPD25%
- Chronic kidney disease25%
- Ischemic heart disease21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zakolski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas John Zakolski wrote 11,750 Medicare Part D claims in 2024
In 2024, Dr. Zakolski wrote 11,750 Medicare Part D claims for 496 patients. 86% of them were for generic drugs. CMS names the drug for 10,888 of them, across 174 drugs with 11 or more claims each, at $791,446 in total drug cost. In 2023, CMS named 10,387 claims across 169 drugs.
Dr. Zakolski's Part D claims by kind of drug, 2024
- Generic10,156 claims86%
- Brand-name1,472 claims13%
- Other122 claims1%
Dr. Zakolski's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Zakolski's Part D claims, 2024
- Opioids4%520 of 11,750 claims
- Antibiotics2%250 of 11,750 claims
- Antipsychotics, patients 65 and over0%33 of 11,750 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 10,3872024: 10,8885%
Drugs named by CMS: 174 in 2024, 169 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Douglas John Zakolski takes part in Medicare
Dr. Zakolski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Douglas John Zakolski received $2,946 in industry payments from 2016 to 2025
CMS Open Payments shows 207 general payments to Dr. Zakolski from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Pfizer Inc. paid the most, $330. It also lists 1 research payment totaling $125 in 2019.
General payments to Dr. Zakolski by program year, 2016 to 2025
General payments to Dr. Zakolski by kind, 2016 to 2025
- Food and beverage$2,82196%
- Education$1254%
Companies that paid Dr. Zakolski the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas John Zakolski graduated from Michigan State University College of Osteopathic Medicine
Dr. Zakolski graduated from Michigan State University College of Osteopathic Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas John Zakolski's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Douglas John Zakolski
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Douglas John Zakolski's NPI number?
Dr. Douglas John Zakolski's NPI number is 1659356400. It was assigned on December 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas John Zakolski?
Dr. Douglas John Zakolski is an internist in Southgate, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Douglas John Zakolski practice?
Dr. Zakolski practices at 14319 Dix Toledo Hwy, Southgate, MI 48195. Dr. Zakolski's primary practice is Oakwood Ambulatory in Southgate, Michigan. Dmand AI also links Dr. Zakolski to 4 hospitals, 3 group practices and clinics, 2 home health agencies and 2 medical groups.
What is Dr. Douglas John Zakolski's office phone number?
The practice phone on file for Dr. Zakolski is (313) 593-7000.
What is Dr. Douglas John Zakolski's medical license number?
Dr. Zakolski holds Michigan license 5101012105.
Which hospitals is Dr. Douglas John Zakolski affiliated with?
Dr. Zakolski is affiliated with Corewell Health William Beaumont University Hospital. Dmand AI links Dr. Zakolski to 4 more hospitals.
What medical group is Dr. Douglas John Zakolski part of?
Dr. Zakolski is linked to Medical Education Associates. Dmand AI links Dr. Zakolski to 2 more medical groups.
Does Dr. Douglas John Zakolski accept Medicare?
Yes. CMS data shows Dr. Zakolski billed Medicare for 570 services in 2024, and Dr. Zakolski accepts Medicare assignment.
How many Medicare patients does Dr. Douglas John Zakolski see?
CMS counts 164 Medicare patients who saw Dr. Zakolski in 2024, with an average age of 69.
What services does Dr. Douglas John Zakolski bill to Medicare?
In 2024, Dr. Zakolski's most billed Medicare services were office visit, established patient (99214), lab and pathology test (83036) and office visit, established patient (99215).
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Where did Dr. Douglas John Zakolski go to medical school?
Dr. Zakolski graduated from Michigan State University College of Osteopathic Medicine in 1983.
What drugs does Dr. Douglas John Zakolski prescribe most?
In 2024 Medicare Part D data, Dr. Zakolski's most prescribed drugs by claims were Atorvastatin Calcium, Alprazolam and Amlodipine Besylate.
Has Dr. Douglas John Zakolski received payments from drug or device companies?
CMS Open Payments shows $2,946 in general payments to Dr. Zakolski from 28 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Douglas John Zakolski been practicing?
Dr. Zakolski graduated from medical school in 1983, 43 years ago.
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