Dr. Hal Gerstein, MD
- Medicare services, 2024
- 666
- Medicare patients, 2024
- 69
- Part D claims, 2024
- 140
- Industry payments
- $107,859
- State license
- 1
- Practice address
- 2686 Middlefield Rd, Redwood City, CA 94063
- Practice phone
- Call (650) 249-9090
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Natera, Inc.
Redwood City, California
Find Dr. Gerstein's professional email, personal email and mobile number
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Dr. Hal Gerstein is a hematologist and oncologist in Redwood City, California
Dr. Gerstein practices at Natera, Inc. in Redwood City, California.
Dr. Gerstein's NPI, 1790874121, was assigned on October 12, 2006. Dr. Gerstein graduated from Albany Medical College of Union University in 1978. Dr. Gerstein holds New York license 138753.
- NPI
- 1790874121NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335203363
- NPI enumeration date
- October 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 249-9090
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hal Gerstein practices at Natera, Inc. in Redwood City, California
Dr. Gerstein's primary practice is Natera, Inc., at 2686 Middlefield Rd, Redwood City, CA 94063 in San Mateo County. The practice phone is (650) 249-9090.
- Natera, Inc.2686 Middlefield Rd, Redwood City, CA 94063 · San Mateo CountyPhone(650) 249-9090
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Hal Gerstein is affiliated with 1 site of care
Dr. Gerstein's primary practice is Natera, Inc. in Redwood City, California.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Hal Gerstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gerstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Natera, Inc. | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hal Gerstein is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Gerstein's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Gerstein is licensed in New York.
Specialties and state licenses
- Hematology and oncology, New YorkPrimary
Hematologists and oncologists near Dr. Gerstein
Counts of hematologists and oncologists 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. Hal Gerstein billed Medicare for 666 services in 2024
CMS data shows 666 Medicare services from Dr. Gerstein across 6 procedure codes in 2024, for 69 Medicare patients. Medicare paid $70,658 for them. Every service was in an office.
Dr. Gerstein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5452024: 48411%
- Tests and treatments
- 2023: 1472024: 9436%
- Surgery
- 2023: 1272024: 8831%
Dr. Gerstein compared with the California median for hematologists and oncologists, 2024
- Dr. Gerstein
- California median
- Medicare services
- 666vs 93229% below
- Medicare patients
- 69vs 22569% below
- Part D claims
- 26vs 39493% below
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Gerstein'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gerstein and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Hal Gerstein treated 69 Medicare patients in 2024, average age 76
CMS counts 69 Medicare patients who saw Dr. Gerstein in 2024. The largest group is 75 to 84, with 34 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 2.03, 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. Gerstein's median patient age at 60, with 68% women.
Dr. Gerstein's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gerstein's Medicare patients by sex, 2024
- Women4667%
- Men2333%
Chronic conditions among Dr. Gerstein's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Cancer51%
- Arthritis49%
- Ischemic heart disease41%
- Diabetes33%
- Anxiety30%
- Chronic kidney disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gerstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women68%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hal Gerstein wrote 140 Medicare Part D claims in 2024
In 2024, Dr. Gerstein wrote 140 Medicare Part D claims for 24 patients. 65% of them were for generic drugs. CMS names the drug for 26 of them, across 2 drugs with 11 or more claims each, at $9,563 in total drug cost. In 2023, CMS named 68 claims across 5 drugs.
Dr. Gerstein's Part D claims by kind of drug, 2024
- Generic91 claims65%
- Brand-name49 claims35%
Dr. Gerstein'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 682024: 2662%
Drugs named by CMS: 2 in 2024, 5 in 2023.
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
How Dr. Hal Gerstein takes part in Medicare
Dr. Gerstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Hal Gerstein received $107,859 in industry payments from 2016 to 2025
CMS Open Payments shows 969 general payments to Dr. Gerstein from 72 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 51% of the total. Lexicon Pharmaceuticals, Inc. paid the most, $61,453.
General payments to Dr. Gerstein by program year, 2016 to 2025
General payments to Dr. Gerstein by kind, 2016 to 2025
- Speaker and faculty fees$54,32051%
- Food and beverage$17,90617%
- Travel and lodging$17,51316%
- Consulting fees$7,8807%
- Other$9,3659%
Companies that paid Dr. Gerstein the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hal Gerstein graduated from Albany Medical College of Union University
Dr. Gerstein graduated from Albany Medical College of Union University in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Hal Gerstein's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Hal Gerstein
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. Hal Gerstein's NPI number?
Dr. Hal Gerstein's NPI number is 1790874121. It was assigned on October 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Hal Gerstein?
Dr. Hal Gerstein is a hematologist and oncologist in Redwood City, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Hal Gerstein practice?
Dr. Gerstein practices at 2686 Middlefield Rd, Redwood City, CA 94063. Dr. Gerstein's primary practice is Natera, Inc. in Redwood City, California.
What is Dr. Hal Gerstein's office phone number?
The practice phone on file for Dr. Gerstein is (650) 249-9090.
What is Dr. Hal Gerstein's medical license number?
Dr. Gerstein holds New York license 138753.
Does Dr. Hal Gerstein accept Medicare?
Yes. CMS data shows Dr. Gerstein billed Medicare for 666 services in 2024, and Dr. Gerstein accepts Medicare assignment.
How many Medicare patients does Dr. Hal Gerstein see?
CMS counts 69 Medicare patients who saw Dr. Gerstein in 2024, with an average age of 76.
What services does Dr. Hal Gerstein bill to Medicare?
In 2024, Dr. Gerstein's most billed Medicare services were office visit, established patient (99215), infusion or chemotherapy administration (96365) and surgery: heart and blood vessels (36415).
Where did Dr. Hal Gerstein go to medical school?
Dr. Gerstein graduated from Albany Medical College of Union University in 1978.
What drugs does Dr. Hal Gerstein prescribe most?
In 2024 Medicare Part D data, Dr. Gerstein's most prescribed drugs by claims were Eliquis and Letrozole.
Has Dr. Hal Gerstein received payments from drug or device companies?
CMS Open Payments shows $107,859 in general payments to Dr. Gerstein from 72 companies from 2016 to 2025. The largest total came from Lexicon Pharmaceuticals, Inc.
How long has Dr. Hal Gerstein been practicing?
Dr. Gerstein graduated from medical school in 1978, 48 years ago.
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