Natalia Zielkiewicz, M.D.
NPI 1033272729 · Hospice and Palliative Medicine (Internal Medicine) Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Hospice/Palliative Care · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natalia Zielkiewicz, M.D. is a Hospice and Palliative Medicine (Internal Medicine) Physician provider in Walnut Creek, CA (NPI 1033272729).
Provider details
- NPI number
- 1033272729
- Entity type
- Individual
- Primary specialty
- Hospice and Palliative Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A96545 (CA)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
359 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 115 | $132 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 110 | $193 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 97 | $55 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 37 | $88 |
Typical Medicare-allowed amounts for these services range $55–$193 (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 (2)
- 5161 Clayton Rd Ste FConcord, CA 94521-3157Phone: (925) 677-0550
- 2700 Grant StSuite 200Concord, CA 94520-2266Phone: (925) 677-0500
Registry dates
- Enumerated
- 2006-12-18
- Last updated
- 2023-03-07
- Certified
- 2021-06-08
Frequently asked questions
- What is Natalia Zielkiewicz's NPI number?
- Natalia Zielkiewicz's National Provider Identifier (NPI) is 1033272729, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natalia Zielkiewicz's specialty?
- Natalia Zielkiewicz is listed in the NPPES registry with a primary specialty of Hospice and Palliative Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Natalia Zielkiewicz located?
- Natalia Zielkiewicz's practice location on file with NPPES is 1450 Treat Blvd # 120, Walnut Creek, CA 94597-2168.
- What is Natalia Zielkiewicz's phone number?
- The practice phone number listed in the NPPES registry for Natalia Zielkiewicz is (925) 296-9720.
- Does Natalia Zielkiewicz accept Medicare?
- Natalia Zielkiewicz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natalia Zielkiewicz's NPI active?
- Yes — Natalia Zielkiewicz's NPI (1033272729) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.