Michael Fretzin, MD
NPI 1134118987 · Procedural Dermatology Physician · Buffalo Grove, IL
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Fretzin, MD is a Procedural Dermatology Physician provider in Buffalo Grove, IL (NPI 1134118987).
Provider details
- NPI number
- 1134118987
- Entity type
- Individual
- Primary specialty
- Procedural Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-102194 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
9,332 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 3,238 | $7 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 1,447 | $94 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 932 | $72 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 842 | $57 |
| Biopsy of Related Skin Growth, First Growth11102 | 551 | $95 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 367 | 251 |
| Ketoconazole | 161 | 90 |
| Clobetasol Propionate | 105 | 76 |
| Valacyclovir Hclbrand: Valacyclovir | 92 | 37 |
| Minoxidil | 79 | 33 |
| Adalimumabbrand: Humira(cf) Pen | 67 | — |
| Doxycycline Hyclate | 62 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,189 across 194 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
- 2005-10-14
- Last updated
- 2015-12-23
Frequently asked questions
- What is Michael Fretzin's NPI number?
- Michael Fretzin's National Provider Identifier (NPI) is 1134118987, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Fretzin's specialty?
- Michael Fretzin is listed in the NPPES registry with a primary specialty of Procedural Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Fretzin located?
- Michael Fretzin's practice location on file with NPPES is 600 W Lake Cook Rd, Buffalo Grove, IL 60089-2089.
- What is Michael Fretzin's phone number?
- The practice phone number listed in the NPPES registry for Michael Fretzin is (847) 459-6611.
- Does Michael Fretzin accept Medicare?
- Michael Fretzin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Fretzin's NPI active?
- Yes — Michael Fretzin's NPI (1134118987) is active in the NPPES registry as of the last update on 2015-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.