Dr. Althaea Z. Greenstone, MD
- Part D claims, 2024
- 150
- Hospital affiliations
- 1
- Industry payments
- $96
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 2238 Geary Blvd, San Francisco, CA 94115
- Practice phone
- Call (415) 833-3700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
San Francisco Medical Center - Mammography
Mammography / Breast Imaging Center · San Francisco, California
Find Dr. Greenstone's professional email, personal email and mobile number
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Dr. Althaea Z. Greenstone is a general surgeon in San Francisco, California
Dr. Greenstone practices at San Francisco Medical Center - Mammography in San Francisco, California.
Dr. Greenstone's NPI, 1497889034, was assigned on March 15, 2007. Dr. Greenstone graduated from UCSF School of Medicine in 2002. Dr. Greenstone's California license number on file is A86390.
- NPI
- 1497889034NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436233269
- NPI enumeration date
- March 15, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 833-3700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Althaea Z. Greenstone practices at San Francisco Medical Center - Mammography in San Francisco, California
Dr. Greenstone's primary practice is San Francisco Medical Center - Mammography, at 2238 Geary Blvd, San Francisco, CA 94115. The practice phone is (415) 833-3700.
- San Francisco Medical Center - Mammography2238 Geary Blvd, San Francisco, CA 94115Phone(415) 833-3700
Source: Dmand AI Affiliation Data
Dr. Althaea Z. Greenstone is affiliated with 3 sites of care and 1 medical group
Dr. Greenstone's primary practice is San Francisco Medical Center - Mammography in San Francisco, California. Dr. Greenstone is also affiliated with San Francisco Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Greenstone to 1 more group practice or clinic, named with a free account. Dr. Greenstone's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Althaea Z. Greenstone's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greenstone practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Francisco Medical Center - Mammography | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Althaea Z. Greenstone is one of 2,926 general surgeons in California
Surgery is Dr. Greenstone's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Greenstone is board certified in surgery by the American Board of Surgery. Dr. Greenstone has a license on file in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists gallbladder removal among the conditions Dr. Greenstone treats.
General surgeons near Dr. Greenstone
Counts of general surgeons 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. Althaea Z. Greenstone's patients have a median age of 60
Across all payers, Dmand AI patient panel data puts Dr. Greenstone's median patient age at 60, with 46% women.
Dr. Greenstone'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
- Women46%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Althaea Z. Greenstone wrote 150 Medicare Part D claims in 2024
In 2024, Dr. Greenstone wrote 150 Medicare Part D claims for 89 patients. 100% of them were for generic drugs. CMS names the drug for 100 of them, across 2 drugs with 11 or more claims each, at $702 in total drug cost. In 2023, CMS named 114 claims across 2 drugs.
Dr. Greenstone'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. Greenstone's Part D claims, 2024
- Opioids47%71 of 150 claims
- Antibiotics8%12 of 150 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1142024: 10012%
Drugs named by CMS: 2 in 2024, 2 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. Althaea Z. Greenstone takes part in Medicare
Dr. Greenstone accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Althaea Z. Greenstone received $96 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Greenstone from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Intuitive Surgical, Inc. paid the most, $96.
Companies that paid Dr. Greenstone the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Althaea Z. Greenstone has 1 award and honors on record
Dmand AI lists 1 award for Dr. Greenstone.
Awards and honors for Dr. Greenstone
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Althaea Z. Greenstone graduated from UCSF School of Medicine
Dr. Greenstone graduated from UCSF School of Medicine in 2002. Dr. Greenstone is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Althaea Z. Greenstone accepts plans from 2 insurance carriers
Dr. Greenstone is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Greenstone accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Althaea Z. Greenstone'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Althaea Z. Greenstone
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. Althaea Z. Greenstone's NPI number?
Dr. Althaea Z. Greenstone's NPI number is 1497889034. It was assigned on March 15, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Althaea Z. Greenstone?
Dr. Althaea Z. Greenstone is a general surgeon in San Francisco, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Althaea Z. Greenstone practice?
Dr. Greenstone practices at 2238 Geary Blvd, San Francisco, CA 94115. Dr. Greenstone's primary practice is San Francisco Medical Center - Mammography in San Francisco, California. Dmand AI also links Dr. Greenstone to 1 group practice or clinic.
What is Dr. Althaea Z. Greenstone's office phone number?
The practice phone on file for Dr. Greenstone is (415) 833-3700.
What is Dr. Althaea Z. Greenstone's medical license number?
Dr. Greenstone's California license number on file is A86390.
Which hospitals is Dr. Althaea Z. Greenstone affiliated with?
Dr. Greenstone is affiliated with San Francisco Medical Center.
What medical group is Dr. Althaea Z. Greenstone part of?
Dr. Greenstone is linked to The Permanente Medical Group, Inc.
Does Dr. Althaea Z. Greenstone accept Medicare?
Yes. CMS lists Dr. Greenstone as accepting Medicare assignment.
Is Dr. Althaea Z. Greenstone board certified?
Yes. Dr. Greenstone is board certified in surgery by the American Board of Surgery.
Where did Dr. Althaea Z. Greenstone go to medical school?
Dr. Greenstone graduated from UCSF School of Medicine in 2002.
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What drugs does Dr. Althaea Z. Greenstone prescribe most?
In 2024 Medicare Part D data, Dr. Greenstone's most prescribed drugs by claims were Oxycodone HCl and Ibuprofen.
Has Dr. Althaea Z. Greenstone received payments from drug or device companies?
CMS Open Payments shows $96 in general payments to Dr. Greenstone from 1 company from 2017 to 2017. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Althaea Z. Greenstone been practicing?
Dr. Greenstone graduated from medical school in 2002, 24 years ago.
What insurance does Dr. Althaea Z. Greenstone accept?
Dr. Greenstone is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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