Gerald Zenk, M.D
NPI 1922291434 · Anesthesiology Physician · Park Ridge, IL
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Zenk, M.D is a Anesthesiology Physician provider in Park Ridge, IL (NPI 1922291434).
Provider details
- NPI number
- 1922291434
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 036-118831 (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
18 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
135 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) |
|---|---|---|
| Anesthesia for Exam of Colon Using an Endoscope00812 | 51 | $53 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 34 | $68 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 27 | $85 |
| Anesthesia for Procedure for Total Knee Joint Replacement01402 | 12 | $189 |
| Anesthesia for Other Procedure on Upper Abdomen00790 | 11 | $226 |
Typical Medicare-allowed amounts for these services range $53–$226 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-20
- Last updated
- 2020-02-19
- Certified
- 2020-02-19
Frequently asked questions
- What is Gerald Zenk's NPI number?
- Gerald Zenk's National Provider Identifier (NPI) is 1922291434, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Zenk's specialty?
- Gerald Zenk is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Zenk located?
- Gerald Zenk's practice location on file with NPPES is 1775 W Dempster St, Park Ridge, IL 60068-1143.
- What is Gerald Zenk's phone number?
- The practice phone number listed in the NPPES registry for Gerald Zenk is (847) 723-2210.
- Does Gerald Zenk accept Medicare?
- Gerald Zenk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Zenk's NPI active?
- Yes — Gerald Zenk's NPI (1922291434) is active in the NPPES registry as of the last update on 2020-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.