J Clin Gastroenterol
Dr. Ronald B. Wasserman, MD
- Medicare services, 2024
- 1,400
- Medicare patients, 2024
- 542
- Part D claims, 2024
- 348
- Publications
- 1
- MIPS score, 2024
- 95
- Practice address
- 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598
- Practice phone
- Call (925) 939-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Wasserman's 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. Ronald B. Wasserman is an infectious disease specialist in Walnut Creek, California
Dr. Wasserman practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health.
Dr. Wasserman's NPI, 1346268067, was assigned on July 18, 2006. Dr. Wasserman graduated from UC San Diego School of Medicine in 1984. Dr. Wasserman's California license number on file is G58454.
- NPI
- 1346268067NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133126808
- NPI enumeration date
- July 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (925) 939-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald B. Wasserman practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California
Dr. Wasserman's primary practice is John Muir Medical Center, Walnut Creek, at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 in Contra Costa County. The practice phone is (925) 939-3000.
- John Muir Medical Center, Walnut Creek1601 Ygnacio Valley Rd, Walnut Creek, CA 94598 · Contra Costa CountyPhone(925) 939-3000
Source: Dmand AI Affiliation Data
Dr. Ronald B. Wasserman is affiliated with 6 sites of care and 4 medical groups
Dr. Wasserman's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dr. Wasserman is also affiliated with Concord Medical Center. The medical group on file is BASS Medical Group. Dmand AI also links Dr. Wasserman to 1 more hospital, 3 group practices and clinics and 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ronald B. Wasserman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wasserman practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| John Muir Medical Center, Walnut Creek | Available with a free account |
| +5 more sites and 3 medical groups | 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 John Muir Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ronald B. Wasserman is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Wasserman's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Wasserman is board certified in internal medicine by the American Board of Internal Medicine. Dr. Wasserman has a license on file in California.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
Clinical focus
Dmand AI lists acute skin infection, cold sores or genital herpes, endocarditis, hiv/aids, joint or bone infection and pneumonia among the conditions Dr. Wasserman treats.
Infectious disease specialists near Dr. Wasserman
Counts of infectious disease specialists 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. Ronald B. Wasserman billed Medicare for 1,400 services in 2024
CMS data shows 1,400 Medicare services from Dr. Wasserman across 8 procedure codes in 2024, for 542 Medicare patients. Medicare paid $178,579 for them.
Dr. Wasserman's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1042024: 1,40027%
- Tests and treatments
- 2023: 1282024: 0100%
Where Dr. Wasserman's Medicare services took place, 2024
- In an office67848%
- In a facility72252%
Dr. Wasserman compared with the California median for infectious disease specialists, 2024
- Dr. Wasserman
- California median
- Medicare services
- 1,400vs 4293.3 times
- Medicare patients
- 542vs 1803.0 times
- Part D claims
- 251vs 1192.1 times
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Wasserman'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.
Need commercial claims for Dr. Wasserman?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Wasserman and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald B. Wasserman treated 542 Medicare patients in 2024, average age 75
CMS counts 542 Medicare patients who saw Dr. Wasserman in 2024. The largest group is 65 to 74, with 191 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 3.15, 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. Wasserman's median patient age at 63, with 49% women.
Dr. Wasserman's Medicare patients by age, 2024
Dr. Wasserman's Medicare patients by sex, 2024
- Women25246%
- Men29054%
Chronic conditions among Dr. Wasserman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Chronic kidney disease51%
- Diabetes49%
- Mood disorders41%
- Heart failure39%
- Atrial fibrillation38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Wasserman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women49%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald B. Wasserman wrote 348 Medicare Part D claims in 2024
In 2024, Dr. Wasserman wrote 348 Medicare Part D claims for 59 patients. 59% of them were for generic drugs. CMS names the drug for 251 of them, across 12 drugs with 11 or more claims each, at $447,691 in total drug cost. In 2023, CMS named 270 claims across 13 drugs.
Dr. Wasserman's Part D claims by kind of drug, 2024
- Generic206 claims59%
- Brand-name142 claims41%
Dr. Wasserman'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. Wasserman's Part D claims, 2024
- Antibiotics31%108 of 348 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: 2702024: 2517%
Drugs named by CMS: 12 in 2024, 13 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
Dr. Ronald B. Wasserman scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Wasserman for performance year 2024, reported individually. Dr. Wasserman accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Wasserman as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Wasserman's MIPS scores, performance year 2024
- 95of 100Final score
- 71.1of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
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. Ronald B. Wasserman has 1 publication on record
Dmand AI links 1 paper to Dr. Wasserman. Dr. Wasserman's most frequent co-authors are Clive Albert, MD, Myron H. Brand, MD and Robert Stephen Brown, MD.
Dr. Wasserman's most frequent co-authors
- Clive Albert, MD1 shared paper
- Myron H. Brand, MD1 shared paper
- Robert Stephen Brown, MD1 shared paper
Recent publications by Dr. Wasserman
See who Dr. Wasserman researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Wasserman works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ronald B. Wasserman received $3,418 in industry payments from 2016 to 2024
CMS Open Payments shows 36 general payments to Dr. Wasserman from 10 drug and device companies from 2016 to 2024. Consulting fees make up the largest share, 40% of the total. Ferring Pharmaceuticals Inc. paid the most, $1,380.
General payments to Dr. Wasserman by program year, 2016 to 2024
General payments to Dr. Wasserman by kind, 2016 to 2024
- Consulting fees$1,38040%
- Food and beverage$1,30638%
- Speaker and faculty fees$55516%
- Education$1765%
Companies that paid Dr. Wasserman the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ronald B. Wasserman graduated from UC San Diego School of Medicine
Dr. Wasserman graduated from UC San Diego School of Medicine in 1984.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Ronald B. Wasserman accepts plans from 8 insurance carriers
Dr. Wasserman is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Humana
- Regence Health Plans
- CMS Medicare
- Molina
Plan types Dr. Wasserman accepts, by number of carriers
- Medicare8
- PPO6
- EPO2
- HMO2
- POS2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ronald B. Wasserman'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)Clinician Public Reporting: Overall MIPS Performance (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. Ronald B. Wasserman
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. Ronald B. Wasserman's NPI number?
Dr. Ronald B. Wasserman's NPI number is 1346268067. It was assigned on July 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald B. Wasserman?
Dr. Ronald B. Wasserman is an infectious disease specialist in Walnut Creek, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Ronald B. Wasserman practice?
Dr. Wasserman practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. Dr. Wasserman's primary practice is John Muir Medical Center, Walnut Creek in Walnut Creek, California, part of John Muir Health. Dmand AI also links Dr. Wasserman to 1 hospital, 3 group practices and clinics and 3 medical groups.
What is Dr. Ronald B. Wasserman's office phone number?
The practice phone on file for Dr. Wasserman is (925) 939-3000.
What is Dr. Ronald B. Wasserman's medical license number?
Dr. Wasserman's California license number on file is G58454.
Which hospitals is Dr. Ronald B. Wasserman affiliated with?
Dr. Wasserman practices at John Muir Medical Center, Walnut Creek in Walnut Creek, California. Dr. Wasserman is also affiliated with Concord Medical Center. Dmand AI links Dr. Wasserman to 1 more hospital.
What medical group is Dr. Ronald B. Wasserman part of?
Dr. Wasserman is linked to BASS Medical Group. Dmand AI links Dr. Wasserman to 3 more medical groups.
Does Dr. Ronald B. Wasserman accept Medicare?
Yes. CMS data shows Dr. Wasserman billed Medicare for 1,400 services in 2024, and Dr. Wasserman accepts Medicare assignment.
Does Dr. Ronald B. Wasserman offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Wasserman as offering telehealth services.
What is Dr. Ronald B. Wasserman's MIPS score?
Dr. Wasserman's MIPS final score for performance year 2024 is 95 out of 100, reported individually.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Ronald B. Wasserman see?
CMS counts 542 Medicare patients who saw Dr. Wasserman in 2024, with an average age of 75.
Is Dr. Ronald B. Wasserman board certified?
Yes. Dr. Wasserman is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Ronald B. Wasserman bill to Medicare?
In 2024, Dr. Wasserman's most billed Medicare services were office visit, established patient (99215), hospital inpatient care (99232) and hospital inpatient care (99233).
Where did Dr. Ronald B. Wasserman go to medical school?
Dr. Wasserman graduated from UC San Diego School of Medicine in 1984.
What drugs does Dr. Ronald B. Wasserman prescribe most?
In 2024 Medicare Part D data, Dr. Wasserman's most prescribed drugs by claims were Biktarvy, Entecavir and Descovy.
Has Dr. Ronald B. Wasserman received payments from drug or device companies?
CMS Open Payments shows $3,418 in general payments to Dr. Wasserman from 10 companies from 2016 to 2024. The largest total came from Ferring Pharmaceuticals Inc.
How long has Dr. Ronald B. Wasserman been practicing?
Dr. Wasserman graduated from medical school in 1984, 42 years ago.
Does Dr. Ronald B. Wasserman do research?
Dmand AI links 1 publication to Dr. Wasserman.
Who does Dr. Ronald B. Wasserman publish with?
Dr. Wasserman's most frequent co-authors are Clive Albert, MD (1 shared paper), Myron H. Brand, MD (1 shared paper) and Robert Stephen Brown, MD (1 shared paper).
What insurance does Dr. Ronald B. Wasserman accept?
Dr. Wasserman is in network with 8 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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