Dr. Leif R. Hass, MD
- Medicare services, 2024
- 819
- Medicare patients, 2024
- 331
- Part D claims, 2024
- 411
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 350 Hawthorne Avenue, Oakland, CA 94609
- Practice phone
- Call (510) 655-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hass' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Leif R. Hass is a hospitalist in Oakland, California
Dr. Hass practices at Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health.
Dr. Hass' NPI, 1528175346, was assigned on August 25, 2006. Dr. Hass graduated from McGill University Faculty of Medicine in 1993. Dr. Hass holds California license G80367.
- NPI
- 1528175346NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355396656
- NPI enumeration date
- August 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 655-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leif R. Hass practices at Alta Bates Summit Medical Center in Oakland, California
Dr. Hass' primary practice is Alta Bates Summit Medical Center, at 350 Hawthorne Avenue, Oakland, CA 94609 in Alameda County. The practice phone is (510) 655-4000.
- Alta Bates Summit Medical Center350 Hawthorne Avenue, Oakland, CA 94609 · Alameda CountyPhone(510) 655-4000
Source: Dmand AI Affiliation Data
Dr. Leif R. Hass is affiliated with 1 site of care and 1 medical group
Dr. Hass' primary practice is Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health. The medical group on file is Palo Alto Foundation Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leif R. Hass' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hass practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alta Bates Summit Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Sutter Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Leif R. Hass is one of 3,186 hospitalists in California
Hospitalist is Dr. Hass' primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Hass is board certified in family medicine by the American Board of Family Medicine. Dr. Hass is licensed in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Clinical focus
Dmand AI lists acute respiratory failure, chest pain, congestive heart failure, electrolyte disorders, gastrointestinal bleeding, gastrointestinal infection, gastrointestinal inflammation and gastrointestinal obstruction among the conditions Dr. Hass treats.
Hospitalists near Dr. Hass
Counts of hospitalists 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. Leif R. Hass billed Medicare for 819 services in 2024
CMS data shows 819 Medicare services from Dr. Hass across 5 procedure codes in 2024, for 331 Medicare patients. Medicare paid $66,644 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hass' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7452024: 81910%
Dr. Hass compared with the California median for hospitalists, 2024
- Dr. Hass
- California median
- Medicare services
- 819vs 43090% above
- Medicare patients
- 331vs 20165% above
- Part D claims
- 139vs 692.0 times
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Hass' 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.
Need commercial claims for Dr. Hass?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hass and other hospitalists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leif R. Hass treated 331 Medicare patients in 2024, average age 76
CMS counts 331 Medicare patients who saw Dr. Hass in 2024. The largest group is 65 to 74, with 109 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 59% are also on Medicaid. Their average risk score is 3.05, 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. Hass' median patient age at 65, with 47% women.
Dr. Hass' Medicare patients by age, 2024
Dr. Hass' Medicare patients by sex, 2024
- Women17753%
- Men15447%
Chronic conditions among Dr. Hass' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease56%
- Diabetes50%
- Heart failure48%
- Arthritis47%
- Mood disorders42%
- Ischemic heart disease41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hass' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women47%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leif R. Hass wrote 411 Medicare Part D claims in 2024
In 2024, Dr. Hass wrote 411 Medicare Part D claims for 136 patients. 82% of them were for generic drugs. CMS names the drug for 139 of them, across 9 drugs with 11 or more claims each, at $13,200 in total drug cost. In 2023, CMS named 62 claims across 5 drugs.
Dr. Hass' Part D claims by kind of drug, 2024
- Generic336 claims82%
- Brand-name and other75 claims18%
Dr. Hass' 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. Hass' Part D claims, 2024
- Opioids5%19 of 411 claims
- Antibiotics10%42 of 411 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: 622024: 139124%
Drugs named by CMS: 9 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. Leif R. Hass takes part in Medicare
Dr. Hass 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. Leif R. Hass has 1 publication on record
Dmand AI links 1 paper to Dr. Hass in 2010.
Recent publications by Dr. Hass
See who Dr. Hass researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hass works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Leif R. Hass received $50 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Hass from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $50.
Companies that paid Dr. Hass the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leif R. Hass graduated from McGill University Faculty of Medicine
Dr. Hass graduated from McGill University Faculty of Medicine in 1993. Dr. Hass is a member of SHM.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Leif R. Hass accepts plans from 3 insurance carriers
Dr. Hass is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, CMS Medicare and RI State Medicaid. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- CMS Medicare
- RI State Medicaid
Plan types Dr. Hass accepts, by number of carriers
- HMO1
- Medicaid1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Leif R. Hass'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Leif R. Hass
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. Leif R. Hass' NPI number?
Dr. Leif R. Hass' NPI number is 1528175346. It was assigned on August 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leif R. Hass?
Dr. Leif R. Hass is a hospitalist in Oakland, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Leif R. Hass practice?
Dr. Hass practices at 350 Hawthorne Avenue, Oakland, CA 94609. Dr. Hass' primary practice is Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health.
What is Dr. Leif R. Hass' office phone number?
The practice phone on file for Dr. Hass is (510) 655-4000.
What is Dr. Leif R. Hass' medical license number?
Dr. Hass holds California license G80367.
Which hospitals is Dr. Leif R. Hass affiliated with?
Dr. Hass practices at Alta Bates Summit Medical Center in Oakland, California.
What medical group is Dr. Leif R. Hass part of?
Dr. Hass is linked to Palo Alto Foundation Medical Group.
Does Dr. Leif R. Hass accept Medicare?
Yes. CMS data shows Dr. Hass billed Medicare for 819 services in 2024, and Dr. Hass accepts Medicare assignment.
How many Medicare patients does Dr. Leif R. Hass see?
CMS counts 331 Medicare patients who saw Dr. Hass in 2024, with an average age of 76.
Is Dr. Leif R. Hass board certified?
Yes. Dr. Hass is board certified in family medicine by the American Board of Family Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Leif R. Hass bill to Medicare?
In 2024, Dr. Hass' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99223).
Where did Dr. Leif R. Hass go to medical school?
Dr. Hass graduated from McGill University Faculty of Medicine in 1993.
What drugs does Dr. Leif R. Hass prescribe most?
In 2024 Medicare Part D data, Dr. Hass' most prescribed drugs by claims were Amlodipine Besylate, Prednisone and Pantoprazole Sodium.
Has Dr. Leif R. Hass received payments from drug or device companies?
CMS Open Payments shows $50 in general payments to Dr. Hass from 1 company from 2025 to 2025. The largest total came from Amgen Inc.
How long has Dr. Leif R. Hass been practicing?
Dr. Hass graduated from medical school in 1993, 33 years ago.
Does Dr. Leif R. Hass do research?
Dmand AI links 1 publication to Dr. Hass.
What insurance does Dr. Leif R. Hass accept?
Dr. Hass is in network with 3 carriers, including Blue Cross Blue Shield of Michigan, CMS Medicare and RI State Medicaid. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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