James Grossweiner, M.D.
NPI 1437114907 · Dermatology Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Grossweiner, M.D. is a Dermatology Physician provider in Naperville, IL (NPI 1437114907).
Provider details
- NPI number
- 1437114907
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-074040 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,480 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 622 | $7 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 402 | $60 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 314 | $96 |
| Biopsy of Related Skin Growth, First Growth11102 | 295 | $101 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 265 | $54 |
| Biopsy of Related Skin Growth, Each Additional Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 72 | 55 |
| Mometasone Furoate | 56 | 43 |
| Fluocinonide | 45 | 24 |
| Desonide | 44 | 33 |
| Metronidazole | 44 | 24 |
| Clindamycin Phosphate | 44 | 27 |
| Clotrimazole | 37 | 23 |
| Mupirocin | 37 | 32 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-19
- Last updated
- 2022-07-18
- Certified
- 2022-07-18
Frequently asked questions
- What is James Grossweiner's NPI number?
- James Grossweiner's National Provider Identifier (NPI) is 1437114907, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Grossweiner's specialty?
- James Grossweiner is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is James Grossweiner located?
- James Grossweiner's practice location on file with NPPES is 1220 Hobson Rd Ste 116, Naperville, IL 60540-8137.
- What is James Grossweiner's phone number?
- The practice phone number listed in the NPPES registry for James Grossweiner is (630) 355-6660.
- Does James Grossweiner accept Medicare?
- James Grossweiner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Grossweiner's NPI active?
- Yes — James Grossweiner's NPI (1437114907) is active in the NPPES registry as of the last update on 2022-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.