Stella Hartono, MD PHD
Allergy & Immunology Physician · Stanford, CA
Stella Hartono, MD PHD is an allergy & immunology physician with a practice address in Stanford, California, and NPI 1588195457, issued on Mar 23, 2017. Check the license (California A198890, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stella Hartono
- Credential
- MD PHD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A198890 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Mar 23, 2017
- Record last updated
- Jan 9, 2026
- Medicare enrollment
- Enrolled (PECOS I20240930002255); accepts Medicare assignment
- Medical or professional school
- Mayo Medical School, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
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Verify Stella Hartono in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A198890Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
48 Medicare Part D claims for 28 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
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.
Industry payments in 2024: $501.76
7 payments; by number, the most common kind was food and beverage; the largest payer was Incyte Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
- Baz Allergy Asthma And Sinus Center IncFresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Stella Hartono among 444 allergy & immunology physician records in California
Stella Hartono, MD PHD is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 91% of them.
- NPI issued2017 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2004 among the 281 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Stanford → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Jennifer Camacho, MDStanford, CA 943051508090192
- C. Garrison Fathman, MDStanford, CA 943051770619926
- Michelle Huffaker, MDStanford, CA 943051407141641
- Shirley Jiang, MDPalo Alto, CA 943051023646247
- Jane Parnes, MDStanford, CA 943051114053360
- James Raitt, MDStanford, CA 943051932235181
- Charles Robinson, MDStanford, CA 943051578699724
- Jyothi Tirumalasetty, MDStanford, CA 943051942257605
Common questions
What is Stella Hartono, MD PHD's NPI number?
Stella Hartono, MD PHD's National Provider Identifier (NPI) is 1588195457, issued on Mar 23, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Stella Hartono, MD PHD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Stella Hartono, MD PHD's license?
NPPES lists California license number A198890, 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 Stella Hartono, MD PHD prescribe under Medicare Part D?
In 2024, Stella Hartono, MD PHD had 48 Medicare Part D claims for 28 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
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.