Giant Cell ArteritisPositron-Emission Tomography
Dr. John M. Loeb, MD
NPI1932106390
- Medicare services, 2020
- 374
- Part D claims, 2021
- 71
- Publications
- 2
- Industry payments
- $2,750
- Insurance carriers
- 4
- Practice address
- 300 Hospital Dr, Vallejo, CA 94589
- Practice phone
- Call (925) 210-1050
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Loeb's professional email, personal email and mobile number
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Dr. John M. Loeb is a rheumatologist in Vallejo, California
Dr. Loeb practices in Vallejo, California.
Dr. Loeb's NPI, 1932106390, was assigned on June 30, 2005. Dr. Loeb graduated from University of Pittsburgh School of Medicine in 1972. Dr. Loeb holds California license G29097.
NPI and contact details
- NPI
- 1932106390NPI Registry (opens in a new tab)
- NPI enumeration date
- June 30, 2005
- NPI status
- Active
- Practice phone
- (925) 210-1050
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John M. Loeb's practice address is in Vallejo, California
Dr. Loeb's practice address in the NPI Registry is 300 Hospital Dr, Vallejo, CA 94589, in Solano County. The practice phone is (925) 210-1050.
- NPI Registry address300 Hospital Dr, Vallejo, CA 94589 · Solano CountyPhone(925) 210-1050
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John M. Loeb's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Loeb practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Loeb's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John M. Loeb is one of 821 rheumatologists in California
Rheumatology is Dr. Loeb's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Loeb is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Loeb's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Rheumatology, CaliforniaPrimary
- Pennsylvania license
Rheumatologists near Dr. Loeb
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
821rheumatologists in California
6rheumatologists in Vallejo
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John M. Loeb billed Medicare for 374 services in 2020
CMS data shows 374 Medicare services from Dr. Loeb across 3 procedure codes in 2020. Medicare paid $28,779 for them. Every service was in an office.
Medicare services, 2020374
Paid by Medicare$28,779
Procedure codes3
Dr. Loeb's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 7972020: 37453%
- Drugs given in the office
- 2019: 1,1642020: 0100%
- Imaging
- 2019: 252020: 0100%
- Surgery
- 2019: 632020: 0100%
Dr. Loeb compared with the California median for rheumatologists, 2020
- Dr. Loeb
- California median
- Medicare services
- 374vs 90058% below
- Part D claims
- 71vs 96293% below
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. Loeb's most billed Medicare procedure codes, 2020
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. Loeb?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Loeb and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John M. Loeb's patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. Loeb's median patient age at 74, with 48% women.
Dr. Loeb's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women48%
- Men41%
Source: Dmand AI Patient Panel Data
Dr. John M. Loeb wrote 71 Medicare Part D claims in 2021
In 2021, Dr. Loeb wrote 71 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $3,365 in total drug cost. In 2020, CMS named 1,736 claims across 28 drugs.
Part D claims, 202171
Drugs named by CMS3
Total drug cost$3,365
Dr. Loeb's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 1,7362021: 7196%
Drugs named by CMS: 3 in 2021, 28 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John M. Loeb has 2 publications on record
Dmand AI links 2 papers to Dr. Loeb. Dr. Loeb's most frequent co-author is Allen D. Cooper, MD.
Papers2
Dr. Loeb's most frequent co-authors
Recent publications by Dr. Loeb
Gastroenterology
AscitesEndocrine System DiseasesHepatomegaly
See who Dr. Loeb researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Loeb works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John M. Loeb received $2,750 in industry payments from 2016 to 2020
CMS Open Payments shows 160 general payments to Dr. Loeb from 28 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $602.
General payments to Dr. Loeb by program year, 2016 to 2020
General payments to Dr. Loeb by kind, 2016 to 2020
$2.7Kin total
- Food and beverage$2,742100%
- Education$70%
Companies that paid Dr. Loeb the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John M. Loeb has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Loeb, most recently Regional Top Doctor in 2014.
Awards and honors for Dr. Loeb
- 2014
- Regional Top Doctor
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John M. Loeb graduated from University of Pittsburgh School of Medicine
Dr. Loeb graduated from University of Pittsburgh School of Medicine in 1972. Dr. Loeb is a member of ACR.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. John M. Loeb accepts plans from 4 insurance carriers
Dr. Loeb is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Regence Health Plans
Plan types Dr. Loeb accepts, by number of carriers
- PPO4
- Medicare3
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John M. Loeb'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 |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| 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. John M. Loeb
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 M. Loeb's NPI number?
Dr. John M. Loeb's NPI number is 1932106390. It was assigned on June 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John M. Loeb?
Dr. John M. Loeb is a rheumatologist in Vallejo, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. John M. Loeb practice?
Dr. Loeb practices at 300 Hospital Dr, Vallejo, CA 94589.
What is Dr. John M. Loeb's office phone number?
The practice phone on file for Dr. Loeb is (925) 210-1050.
What is Dr. John M. Loeb's medical license number?
Dr. Loeb holds California license G29097, one of the licenses on file in 2 states.
Which states has Dr. John M. Loeb been licensed in?
Dmand AI has state licenses on file for Dr. Loeb in California (1975 to 2026) and Pennsylvania (1973 to 1976).
Does Dr. John M. Loeb accept Medicare?
Yes. CMS data shows Dr. Loeb billed Medicare for 374 services in 2020.
Is Dr. John M. Loeb board certified?
Yes. Dr. Loeb is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John M. Loeb bill to Medicare?
In 2020, Dr. Loeb's most billed Medicare services were office visit, established patient (99214), care management and other visits (99442) and care management and other visits (99443).
Where did Dr. John M. Loeb go to medical school?
Dr. Loeb graduated from University of Pittsburgh School of Medicine in 1972.
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What drugs does Dr. John M. Loeb prescribe most?
In 2021 Medicare Part D data, Dr. Loeb's most prescribed drugs by claims were Prednisone, Hydroxychloroquine Sulfate and Gabapentin.
Has Dr. John M. Loeb received payments from drug or device companies?
CMS Open Payments shows $2,750 in general payments to Dr. Loeb from 28 companies from 2016 to 2020. The largest total came from Amgen Inc.
How long has Dr. John M. Loeb been practicing?
Dr. Loeb graduated from medical school in 1972, 54 years ago.
Does Dr. John M. Loeb do research?
Dmand AI links 2 publications to Dr. Loeb.
Who does Dr. John M. Loeb publish with?
Dr. Loeb's most frequent co-authors are Allen D. Cooper, MD (1 shared paper).
What insurance does Dr. John M. Loeb accept?
Dr. Loeb is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. PPO plans come from the most carriers, 4. Check the plan with the practice before a visit.
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