Aliya Gessling, M.D.
Hospice and Palliative Medicine (Internal Medicine) Physician · Walnut Creek, CA
Aliya Gessling, M.D. is a hospice and palliative medicine (internal medicine) physician with a practice address in Walnut Creek, California, and NPI 1912389149, issued on Jun 24, 2015. Check the license (California A152979, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aliya Gessling
- Credential
- M.D.
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- A152979 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (925) 295-4000
- Enumerated
- Jun 24, 2015
- Record last updated
- Jan 8, 2023
- Medicare enrollment
- Enrolled (PECOS I20190201000589); 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 1425 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
- Peter Ackerman, MDEmergency Medicine Physician1427435023
- Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
- Basil Adad, MDOtolaryngology Physician1487732574
- Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804
Verify Aliya Gessling in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152979Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024
26 Medicare Part D claims for 18 beneficiaries, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
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
- Permanente Medical Group IncOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aliya Gessling among 260 hospice and palliative medicine (internal medicine) physician records in California
Aliya Gessling, 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 2015, is newer than 69% of them.
- NPI issued2015 · 69% of these records are older, 26% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2015 · 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
- Sandra Karpenko, M.D.Walnut Creek, CA 945951780745281
- Levy Jo Manuntag, MDWalnut Creek, CA 945971932696846
- Shabnam Yekta, M.D.Walnut Creek, CA 945971932513744
- Natalia Zielkiewicz, M.D.Walnut Creek, CA 945971033272729
- Donna Foliart, M.D.Walnut Creek, CA 945981205051687
- Fallon Bushee, MDOakland, CA 946021750918769
- Faren ClumOakland, CA 946021639565773
Common questions
What is Aliya Gessling, M.D.'s NPI number?
Aliya Gessling, M.D.'s National Provider Identifier (NPI) is 1912389149, issued on Jun 24, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Aliya Gessling, M.D. located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.
How can I verify Aliya Gessling, M.D.'s license?
NPPES lists California license number A152979, 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.
How much does Aliya Gessling, M.D. prescribe under Medicare Part D?
In 2024, Aliya Gessling, M.D. had 26 Medicare Part D claims for 18 beneficiaries; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Aliya Gessling, 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.