Dr. John R. Chamberlain, MD
- Medicare services, 2024
- 614
- Medicare patients, 2024
- 165
- Part D claims, 2024
- 98
- Publications
- 4
- MIPS score, 2024
- 85
- Practice address
- 505 Parnassus Ave, Box 0296, San Francisco, CA 94143
- Practice phone
- Call (415) 353-2733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Chamberlain'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. John R. Chamberlain is a forensic psychiatry physician in San Francisco, California
Dr. Chamberlain practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
Dr. Chamberlain's NPI, 1114036480, was assigned on August 30, 2006. Dr. Chamberlain graduated from UC San Diego School of Medicine in 1995. Dr. Chamberlain holds California license A065086.
- NPI
- 1114036480NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749364818
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John R. Chamberlain practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
Dr. Chamberlain's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.
- UCSF Helen Diller Medical Center at Parnassus Heights505 Parnassus Ave, Box 0296, San Francisco, CA 94143 · San Francisco CountyPhone(415) 353-2733
Source: Dmand AI Affiliation Data
Dr. John R. Chamberlain is affiliated with 4 sites of care and 4 medical groups
Dr. Chamberlain's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Chamberlain to 3 more 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. John R. Chamberlain's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chamberlain practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSF Helen Diller Medical Center at Parnassus Heights | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John R. Chamberlain is one of 62 forensic psychiatry physicians in California
Forensic psychiatry is Dr. Chamberlain's primary specialty in the NPI Registry, under taxonomy code 2084F0202X. Dr. Chamberlain is board certified in forensic psychiatry by the American Board of Psychiatry and Neurology. Dr. Chamberlain is licensed in California.
Specialties and state licenses
- Forensic psychiatry, CaliforniaPrimary
Clinical focus
Dmand AI lists ADHD, adjustment disease, alcohol use disorders, anxiety, bipolar disorder, depression, drug use disorders and insomnia among the conditions Dr. Chamberlain treats.
Forensic psychiatry physicians near Dr. Chamberlain
Counts of forensic psychiatry physicians 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. John R. Chamberlain billed Medicare for 614 services in 2024
CMS data shows 614 Medicare services from Dr. Chamberlain across 2 procedure codes in 2024, for 165 Medicare patients. Medicare paid $46,991 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chamberlain's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7442024: 50732%
- Tests and treatments
- 2023: 1372024: 10722%
Dr. Chamberlain compared with the California median for forensic psychiatry physicians, 2024
- Dr. Chamberlain
- California median
- Medicare services
- 614vs 976.3 times
- Medicare patients
- 165vs 325.2 times
- Part D claims
- 27vs 7263% below
Medians across 56 forensic psychiatry physicians in California with Dmand AI profiles that report each measure.
Dr. Chamberlain'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. Chamberlain?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chamberlain and other forensic psychiatry physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John R. Chamberlain treated 165 Medicare patients in 2024, average age 67
CMS counts 165 Medicare patients who saw Dr. Chamberlain in 2024. The largest group is 65 to 74, with 61 patients. 75% of them have anxiety, and 75% have depression. 44% are also on Medicaid. Their average risk score is 1.88, 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. Chamberlain's median patient age at 63, with 61% women.
Dr. Chamberlain's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chamberlain's Medicare patients by sex, 2024
- Women10362%
- Men6238%
Chronic conditions among Dr. Chamberlain's Medicare patients, 2024
- Anxiety75%
- Depression75%
- Mood disorders75%
- High blood pressure63%
- High cholesterol61%
- Arthritis47%
- Chronic kidney disease30%
- Bipolar disorder25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chamberlain'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
- Women61%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John R. Chamberlain wrote 98 Medicare Part D claims in 2024
In 2024, Dr. Chamberlain wrote 98 Medicare Part D claims for 31 patients. 98% of them were for generic drugs. CMS names the drug for 27 of them, across 2 drugs with 11 or more claims each, at $174 in total drug cost. In 2023, CMS named 30 claims across 2 drugs.
Dr. Chamberlain's Part D claims by kind of drug, 2024
- Generic96 claims98%
- Brand-name and other2 claims2%
Dr. Chamberlain'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: 302024: 2710%
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
Dr. John R. Chamberlain scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. Chamberlain for performance year 2024, reported as part of a group. Dr. Chamberlain accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chamberlain as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Chamberlain's MIPS scores, performance year 2024
- 85of 100Final score
- 81.1of 100Quality
- 40of 100Improvement Activities
- 71of 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. John R. Chamberlain has 4 publications on record
Dmand AI links 4 papers to Dr. Chamberlain in 2017. Dr. Chamberlain has published most often in J Am Acad Psychiatry Law. Dr. Chamberlain's most frequent co-authors are James Alden Armontrout, MD, Vivek Datta, MD, MPH and Stephen E. Hall, MD.
Dr. Chamberlain's most frequent co-authors
- James Alden Armontrout, MD1 shared paper
- Vivek Datta, MD, MPH1 shared paper
- Stephen E. Hall, MD1 shared paper
Recent publications by Dr. Chamberlain
J Am Acad Psychiatry Law
See who Dr. Chamberlain researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chamberlain works with, so you can find a warm path to the right forensic psychiatry physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John R. Chamberlain graduated from UC San Diego School of Medicine
Dr. Chamberlain graduated from UC San Diego School of Medicine in 1995.
- Medical school
- Board certified in forensic psychiatry
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. John R. Chamberlain accepts plans from 8 insurance carriers
Dr. Chamberlain is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Elevance
- United Healthcare
Plan types Dr. Chamberlain accepts, by number of carriers
- Medicare7
- PPO5
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John R. Chamberlain'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 |
| 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. John R. Chamberlain
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. John R. Chamberlain's NPI number?
Dr. John R. Chamberlain's NPI number is 1114036480. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John R. Chamberlain?
Dr. John R. Chamberlain is a forensic psychiatry physician in San Francisco, California. The primary specialty in the NPI Registry is Forensic Psychiatry Physician (taxonomy code 2084F0202X).
Where does Dr. John R. Chamberlain practice?
Dr. Chamberlain practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Chamberlain's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links Dr. Chamberlain to 3 group practices and clinics and 3 medical groups.
What is Dr. John R. Chamberlain's office phone number?
The practice phone on file for Dr. Chamberlain is (415) 353-2733.
What is Dr. John R. Chamberlain's medical license number?
Dr. Chamberlain holds California license A065086.
Which hospitals is Dr. John R. Chamberlain affiliated with?
Dr. Chamberlain practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California.
What medical group is Dr. John R. Chamberlain part of?
Dr. Chamberlain is linked to UCSF Pediatrics. Dmand AI links Dr. Chamberlain to 3 more medical groups.
Does Dr. John R. Chamberlain accept Medicare?
Yes. CMS data shows Dr. Chamberlain billed Medicare for 614 services in 2024, and Dr. Chamberlain accepts Medicare assignment.
Does Dr. John R. Chamberlain offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chamberlain as offering telehealth services.
What is Dr. John R. Chamberlain's MIPS score?
Dr. Chamberlain's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. John R. Chamberlain see?
CMS counts 165 Medicare patients who saw Dr. Chamberlain in 2024, with an average age of 67.
Is Dr. John R. Chamberlain board certified?
Yes. Dr. Chamberlain is board certified in forensic psychiatry by the American Board of Psychiatry and Neurology.
What services does Dr. John R. Chamberlain bill to Medicare?
In 2024, Dr. Chamberlain's most billed Medicare services were office visit, established patient (99214) and psychiatric service (90833).
Where did Dr. John R. Chamberlain go to medical school?
Dr. Chamberlain graduated from UC San Diego School of Medicine in 1995.
What drugs does Dr. John R. Chamberlain prescribe most?
In 2024 Medicare Part D data, Dr. Chamberlain's most prescribed drugs by claims were Mirtazapine and Diazepam.
How long has Dr. John R. Chamberlain been practicing?
Dr. Chamberlain graduated from medical school in 1995, 31 years ago.
Does Dr. John R. Chamberlain do research?
Dmand AI links 4 publications to Dr. Chamberlain.
Who does Dr. John R. Chamberlain publish with?
Dr. Chamberlain's most frequent co-authors are James Alden Armontrout, MD (1 shared paper), Vivek Datta, MD, MPH (1 shared paper) and Stephen E. Hall, MD (1 shared paper).
What insurance does Dr. John R. Chamberlain accept?
Dr. Chamberlain is in network with 8 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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