Dr. Errol Omaar Ozdalga, MD, MS

  • Stanford, CA
  • Internist
NPI1982851499PAC ID0345418364
Medicare services, 2024
517
Medicare patients, 2024
140
Part D claims, 2024
199
Publications
16
MIPS score, 2024
89
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 4 affiliations

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Dr. Errol Omaar Ozdalga is an internist in Stanford, California

Dr. Ozdalga practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Ozdalga's NPI, 1982851499, was assigned on August 26, 2008. Dr. Ozdalga graduated from New York Medical College in 2008. Dr. Ozdalga holds California license A108902.

NPI and contact details
Medicare PAC ID
0345418364
NPI enumeration date
August 26, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(650) 723-4000
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
44
Medical school graduation
2008

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Errol Omaar Ozdalga practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Dr. Ozdalga's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Source: Dmand AI Affiliation Data

Dr. Errol Omaar Ozdalga is affiliated with 2 sites of care and 2 medical groups

Dr. Ozdalga's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Ozdalga to 1 more hospital and 1 medical group, each named with a free account. Dr. Ozdalga's employer is on file too: a hospital.

See all 4 affiliations for Dr. Ozdalga

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Errol Omaar Ozdalga's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ozdalga practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Stanford Hospital at 300 Pasteur DriveAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Errol Omaar Ozdalga is one of 16,751 internists in California

Internal medicine is Dr. Ozdalga's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ozdalga is board certified in internal medicine by the American Board of Internal Medicine. Dr. Ozdalga is licensed in California.

Specialties and state licenses

  • Internal medicine, CaliforniaPrimaryLicense A108902 · 2009 to 2027 · taxonomy 207R00000X

Clinical focus

Dmand AI lists acute respiratory failure, cardiac arrhythmia, congestive heart failure, dementia, electrolyte disorders, gastrointestinal infection, gastrointestinal inflammation and heart attack among the conditions Dr. Ozdalga treats.

Internists near Dr. Ozdalga

Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Errol Omaar Ozdalga billed Medicare for 517 services in 2024

CMS data shows 517 Medicare services from Dr. Ozdalga across 3 procedure codes in 2024, for 140 Medicare patients. Medicare paid $58,887 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024517
Medicare patients140
Paid by Medicare$58,887
Procedure codes3

Dr. Ozdalga compared with the California median for internists, 2024

  • Dr. Ozdalga
  • California median
Medicare services
517vs 36143% above
Medicare patients
140vs 1517% below
Part D claims
53vs 42187% below

Medians across 15,815 internists in California with Dmand AI profiles that report each measure.

Dr. Ozdalga's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Ozdalga

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Errol Omaar Ozdalga treated 140 Medicare patients in 2024, average age 77

CMS counts 140 Medicare patients who saw Dr. Ozdalga in 2024. The largest group is 85 and over, with 44 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 46% are also on Medicaid. Their average risk score is 2.86, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Ozdalga's median patient age at 57, with 40% women.

Medicare patients, 2024140
Average age77
Average risk score2.86
Also on Medicaid46%

Dr. Ozdalga's Medicare patients by age, 2024

Dr. Ozdalga's Medicare patients by sex, 2024

  • Women7050%
  • Men7050%

Chronic conditions among Dr. Ozdalga's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol71%
  3. Chronic kidney disease55%
  4. Arthritis46%
  5. Ischemic heart disease46%
  6. Heart failure45%
  7. Alzheimer's and dementia43%
  8. Diabetes43%

Share of Medicare patients with each condition. A patient can have several.

Dr. Ozdalga's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 57

Patient panel by sex, all payers

  • Women40%
  • Men59%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Errol Omaar Ozdalga wrote 199 Medicare Part D claims in 2024

In 2024, Dr. Ozdalga wrote 199 Medicare Part D claims for 61 patients. 84% of them were for generic drugs. CMS names the drug for 53 of them, across 2 drugs with 11 or more claims each, at $16,971 in total drug cost.

Part D claims, 2024199
Drugs named by CMS2
Total drug cost$16,971
Part D patients61

Dr. Ozdalga's Part D claims by kind of drug, 2024

  • Generic167 claims84%
  • Brand-name and other32 claims16%

Dr. Ozdalga's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Ozdalga's Part D claims, 2024

  • Antibiotics29%58 of 199 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by Dr. Ozdalga

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Errol Omaar Ozdalga scored 89 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Ozdalga for performance year 2024, reported as part of a group. Dr. Ozdalga accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Ozdalga's MIPS scores, performance year 2024

  • 89of 100Final score
  • 87.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 70of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Errol Omaar Ozdalga has 16 publications on record

Dmand AI links 16 papers to Dr. Ozdalga, published from 2011 to 2022. 2016 was the busiest year, with 5. The most frequent topics are Clinical Competence, Physical Examination and Education, Medical. Dr. Ozdalga has published most often in JAMA. Dr. Ozdalga's most frequent co-authors are John F. Kugler, MD, Neera Khilnani Ahuja, MD and John D. Kugler, MD.

Papers16
Years published2011 to 2022

Dr. Ozdalga's papers by year, 2011 to 2022

Topics Dr. Ozdalga writes about most

  • Clinical Competence
  • Physical Examination
  • Education, Medical
  • Physician-Patient Relations
  • Point-of-Care Systems
  • Teaching

Dr. Ozdalga's most frequent co-authors

Recent publications by Dr. Ozdalga

See all 16 publications and co-authors

See who Dr. Ozdalga researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ozdalga works with, so you can find a warm path to the right internists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Errol Omaar Ozdalga graduated from New York Medical College

Dr. Ozdalga graduated from New York Medical College in 2008.

  1. Medical schoolNew York Medical College
  2. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Errol Omaar Ozdalga accepts plans from 7 insurance carriers

Dr. Ozdalga is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • Excellus BlueCross BlueShield
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • HCSC
  • Regence Health Plans
  • CMS Medicare

Plan types Dr. Ozdalga accepts, by number of carriers

  1. Medicare6
  2. PPO6
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Errol Omaar Ozdalga's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Errol Omaar Ozdalga

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Errol Omaar Ozdalga's NPI number?

Dr. Errol Omaar Ozdalga's NPI number is 1982851499. It was assigned on August 26, 2008, and it is active in the NPI Registry.

What kind of doctor is Dr. Errol Omaar Ozdalga?

Dr. Errol Omaar Ozdalga is an internist in Stanford, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Errol Omaar Ozdalga practice?

Dr. Ozdalga practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Ozdalga's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Ozdalga to 1 hospital and 1 medical group.

What is Dr. Errol Omaar Ozdalga's office phone number?

The practice phone on file for Dr. Ozdalga is (650) 723-4000.

What is Dr. Errol Omaar Ozdalga's medical license number?

Dr. Ozdalga holds California license A108902.

Which hospitals is Dr. Errol Omaar Ozdalga affiliated with?

Dr. Ozdalga practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dmand AI links Dr. Ozdalga to 1 more hospital.

What medical group is Dr. Errol Omaar Ozdalga part of?

Dr. Ozdalga is linked to Stanford Health Care. Dmand AI links Dr. Ozdalga to 1 more medical group.

Does Dr. Errol Omaar Ozdalga accept Medicare?

Yes. CMS data shows Dr. Ozdalga billed Medicare for 517 services in 2024, and Dr. Ozdalga accepts Medicare assignment.

What is Dr. Errol Omaar Ozdalga's MIPS score?

Dr. Ozdalga's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.

How many Medicare patients does Dr. Errol Omaar Ozdalga see?

CMS counts 140 Medicare patients who saw Dr. Ozdalga in 2024, with an average age of 77.

Show 8 more questionsShow fewer questions

Is Dr. Errol Omaar Ozdalga board certified?

Yes. Dr. Ozdalga is board certified in internal medicine by the American Board of Internal Medicine.

What services does Dr. Errol Omaar Ozdalga bill to Medicare?

In 2024, Dr. Ozdalga's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).

Where did Dr. Errol Omaar Ozdalga go to medical school?

Dr. Ozdalga graduated from New York Medical College in 2008.

What drugs does Dr. Errol Omaar Ozdalga prescribe most?

In 2024 Medicare Part D data, Dr. Ozdalga's most prescribed drugs by claims were Cefepime HCl and Eliquis.

How long has Dr. Errol Omaar Ozdalga been practicing?

Dr. Ozdalga graduated from medical school in 2008, 18 years ago.

Does Dr. Errol Omaar Ozdalga do research?

Dmand AI links 16 publications to Dr. Ozdalga, published from 2011 to 2022.

Who does Dr. Errol Omaar Ozdalga publish with?

Dr. Ozdalga's most frequent co-authors are John F. Kugler, MD (4 shared papers), Neera Khilnani Ahuja, MD (3 shared papers) and John D. Kugler, MD (3 shared papers).

What insurance does Dr. Errol Omaar Ozdalga accept?

Dr. Ozdalga is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Excellus BlueCross BlueShield and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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