Natalia Zielkiewicz, M.D.
Hospice and Palliative Medicine (Internal Medicine) Physician · Walnut Creek, CA
Natalia Zielkiewicz, M.D. is a hospice and palliative medicine (internal medicine) physician with a practice address in Walnut Creek, California, and NPI 1033272729, issued on Dec 18, 2006. Check the license (California A96545, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Natalia Zielkiewicz
- Credential
- M.D.
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- A96545 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Treat Blvd # 120, Walnut Creek, CA 94597
- Phone
- (925) 296-9720
- Enumerated
- Dec 18, 2006
- Record last updated
- Mar 7, 2023
- Medicaid ID
- 1033272729 CA
- Medicare enrollment
- Enrolled (PECOS I20070615000629); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Also registered at 1450 Treat Blvd # 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ka Ying Chui, NPFamily Nurse Practitioner1659007060
- Elizabeth Delaney, M.D.Family Medicine Physician1073739033
- Trudy Singzon, M.D.Hospice and Palliative Medicine (Family Medicine) Physician1083745285
Verify Natalia Zielkiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96545Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 85.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Natalia Zielkiewicz among 260 hospice and palliative medicine (internal medicine) physician records in California
Natalia Zielkiewicz, M.D. is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 75% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2004 · median 2010 among the 193 with a school on file
- Record last updated2023 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Walnut Creek → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Mariko Feuz, DOWalnut Creek, CA 945971912575853
- Levy Jo Manuntag, MDWalnut Creek, CA 945971932696846
- Shabnam Yekta, M.D.Walnut Creek, CA 945971932513744
- Donna Foliart, M.D.Walnut Creek, CA 945981205051687
- Aliya Gessling, M.D.Walnut Creek, CA 945961912389149
- Sandra Karpenko, M.D.Walnut Creek, CA 945951780745281
- Fallon Bushee, MDOakland, CA 946021750918769
- Faren ClumOakland, CA 946021639565773
Common questions
What is Natalia Zielkiewicz, M.D.'s NPI number?
Natalia Zielkiewicz, M.D.'s National Provider Identifier (NPI) is 1033272729, issued on Dec 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Natalia Zielkiewicz, M.D. located?
The NPPES record lists a practice address at 1450 Treat Blvd # 120, Walnut Creek, CA, 94597. Phone: (925) 296-9720. Providers update this record themselves, so call before visiting.
How can I verify Natalia Zielkiewicz, M.D.'s license?
NPPES lists California license number A96545, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Natalia Zielkiewicz, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.