David Grenda, MD, PHD
NPI 1336344928 · Anesthesiology Physician · Eau Claire, WI
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Grenda, MD, PHD is a Anesthesiology Physician provider in Eau Claire, WI (NPI 1336344928).
Provider details
- NPI number
- 1336344928
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 69909 (GA)
Specialties & taxonomies
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 tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
228 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 97 | $208 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 89 | $116 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 19 | $77 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 12 | $66 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 11 | $42 |
Typical Medicare-allowed amounts for these services range $42–$208 (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
Additional practice locations (1)
- 1800 Howell Mill Rd NwAtlanta, GA 30318-2538Phone: (404) 351-1745Fax: (404) 351-7121
Registry dates
- Enumerated
- 2007-06-15
- Last updated
- 2025-09-05
- Certified
- 2025-09-05
Frequently asked questions
- What is David Grenda's NPI number?
- David Grenda's National Provider Identifier (NPI) is 1336344928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Grenda's specialty?
- David Grenda is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is David Grenda located?
- David Grenda's practice location on file with NPPES is 1400 Bellinger Street, Eau Claire, WI 54703-5222.
- What is David Grenda's phone number?
- The practice phone number listed in the NPPES registry for David Grenda is (715) 833-5222.
- Does David Grenda accept Medicare?
- David Grenda is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Grenda's NPI active?
- Yes — David Grenda's NPI (1336344928) is active in the NPPES registry as of the last update on 2025-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.