Dr. John M. Gilbert, MD
- Medicare services, 2024
- 2,054
- Medicare patients, 2024
- 620
- Part D claims, 2024
- 11,752
- Hospital affiliations
- 2
- Industry payments
- $662,210
- Practice address
- 100 E Valencia Mesa Dr, Fullerton, CA 92835
- Practice phone
- Call (714) 738-4282
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mesa Surgicenter
Fullerton, California
Find Dr. Gilbert'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 M. Gilbert is an endocrinologist in Fullerton, California
Dr. Gilbert practices at Mesa Surgicenter in Fullerton, California.
Dr. Gilbert's NPI, 1588650667, was assigned on September 23, 2005. Dr. Gilbert graduated from SUNY Downstate Health Sciences University in 1983. Dr. Gilbert holds California license G53352.
- NPI
- 1588650667NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608906524
- NPI enumeration date
- September 23, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 738-4282
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John M. Gilbert practices at Mesa Surgicenter in Fullerton, California
Dr. Gilbert's primary practice is Mesa Surgicenter, at 100 E Valencia Mesa Dr, Fullerton, CA 92835 in Orange County. The practice phone is (714) 738-4282.
- Mesa Surgicenter100 E Valencia Mesa Dr, Fullerton, CA 92835 · Orange CountyPhone(714) 738-4282
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John M. Gilbert is affiliated with 4 sites of care and 1 medical group
Dr. Gilbert's primary practice is Mesa Surgicenter in Fullerton, California. Dr. Gilbert is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Dr. Gilbert to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John M. Gilbert's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gilbert practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mesa Surgicenter | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John M. Gilbert is one of 1,062 endocrinologists in California
Endocrinology, diabetes and metabolism is Dr. Gilbert's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Gilbert is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine. Dmand AI has Dr. Gilbert's licenses on file in 2 states: California and Texas.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, CaliforniaPrimary
- Texas license
Clinical focus
Dmand AI lists chronic diabetes, diabetic emergency, enlarged thyroid, fluid and electrolyte imbalances, high cholesterol, hypercalcemia, osteoporosis and overactive thyroid among the conditions Dr. Gilbert treats.
Endocrinologists near Dr. Gilbert
Counts of endocrinologists 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 M. Gilbert billed Medicare for 2,054 services in 2024
CMS data shows 2,054 Medicare services from Dr. Gilbert across 12 procedure codes in 2024, for 620 Medicare patients. Medicare paid $123,102 for them.
Dr. Gilbert's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1482024: 1,145No change
- Other services
- 2023: 02024: 696
- Tests and treatments
- 2023: 1882024: 11340%
- Surgery
- 2023: 3152024: 7477%
- Lab and pathology
- 2023: 02024: 14
- Imaging
- 2023: 412024: 1271%
- Drugs given in the office
- 2023: 1,0802024: 0100%
Where Dr. Gilbert's Medicare services took place, 2024
- In an office2,01498%
- In a facility402%
Dr. Gilbert compared with the California median for endocrinologists, 2024
- Dr. Gilbert
- California median
- Medicare services
- 2,054vs 6753.0 times
- Medicare patients
- 620vs 2402.6 times
- Part D claims
- 10,972vs 1,1049.9 times
Medians across 994 endocrinologists in California with Dmand AI profiles that report each measure.
Dr. Gilbert'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gilbert and other endocrinologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John M. Gilbert treated 620 Medicare patients in 2024, average age 76
CMS counts 620 Medicare patients who saw Dr. Gilbert in 2024. The largest group is 75 to 84, with 262 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.59, 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. Gilbert's median patient age at 71, with 66% women.
Dr. Gilbert's Medicare patients by age, 2024
Dr. Gilbert's Medicare patients by sex, 2024
- Women39363%
- Men22737%
Chronic conditions among Dr. Gilbert's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes55%
- Arthritis52%
- Chronic kidney disease41%
- Osteoporosis38%
- Ischemic heart disease27%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gilbert's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John M. Gilbert wrote 11,752 Medicare Part D claims in 2024
In 2024, Dr. Gilbert wrote 11,752 Medicare Part D claims for 1,100 patients. 64% of them were for generic drugs. CMS names the drug for 10,972 of them, across 121 drugs with 11 or more claims each, at $3,380,833 in total drug cost. In 2023, CMS named 10,891 claims across 130 drugs.
Dr. Gilbert's Part D claims by kind of drug, 2024
- Generic7,557 claims64%
- Brand-name3,756 claims32%
- Other439 claims4%
Dr. Gilbert'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. Gilbert's Part D claims, 2024
- Opioids0%13 of 11,752 claims
- Antibiotics0%27 of 11,752 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: 10,8912024: 10,9721%
Drugs named by CMS: 121 in 2024, 130 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 M. Gilbert offers telehealth to Medicare patients
Dr. Gilbert accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Gilbert as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John M. Gilbert received $662,210 in industry payments from 2016 to 2025
CMS Open Payments shows 1,768 general payments to Dr. Gilbert from 54 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 75% of the total. Novo Nordisk Inc paid the most, $230,497. It also lists 2 research payments totaling $99 in 2017.
General payments to Dr. Gilbert by program year, 2016 to 2025
General payments to Dr. Gilbert by kind, 2016 to 2025
- Speaker and faculty fees$498,27475%
- Compensation for serving as faculty or as a speaker for a medical education program$51,3458%
- Travel and lodging$38,8966%
- Food and beverage$38,0506%
- Other$34,8695%
Companies that paid Dr. Gilbert the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John M. Gilbert has 1 award and honors on record
Dmand AI lists 1 award for Dr. Gilbert, most recently CMS Stage 1 EHR in 2011.
Awards and honors for Dr. Gilbert
- 2011
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John M. Gilbert graduated from SUNY Downstate Health Sciences University
Dr. Gilbert graduated from SUNY Downstate Health Sciences University in 1983. Dr. Gilbert is a member of AACE.
- Medical school
- Board certified in endocrinology, diabetes and metabolism
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John M. Gilbert accepts plans from 12 insurance carriers
Dr. Gilbert is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- +4 more carriersWith a free account
Plan types Dr. Gilbert accepts, by number of carriers
- Medicare8
- PPO7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. John M. Gilbert'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| 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. Gilbert
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. Gilbert's NPI number?
Dr. John M. Gilbert's NPI number is 1588650667. It was assigned on September 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John M. Gilbert?
Dr. John M. Gilbert is an endocrinologist in Fullerton, California. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. John M. Gilbert practice?
Dr. Gilbert practices at 100 E Valencia Mesa Dr, Fullerton, CA 92835. Dr. Gilbert's primary practice is Mesa Surgicenter in Fullerton, California. Dmand AI also links Dr. Gilbert to 1 hospital and 1 group practice or clinic.
What is Dr. John M. Gilbert's office phone number?
The practice phone on file for Dr. Gilbert is (714) 738-4282.
What is Dr. John M. Gilbert's medical license number?
Dr. Gilbert holds California license G53352, one of the licenses on file in 2 states.
Which states has Dr. John M. Gilbert been licensed in?
Dmand AI has state licenses on file for Dr. Gilbert in California (1984 to 2027) and Texas (1981 to 2014).
Which hospitals is Dr. John M. Gilbert affiliated with?
Dr. Gilbert is affiliated with Providence St. Jude Medical Center. Dmand AI links Dr. Gilbert to 1 more hospital.
What medical group is Dr. John M. Gilbert part of?
Dr. Gilbert is linked to St. Jude Heritage Medical Group.
Does Dr. John M. Gilbert accept Medicare?
Yes. CMS data shows Dr. Gilbert billed Medicare for 2,054 services in 2024, and Dr. Gilbert accepts Medicare assignment.
Does Dr. John M. Gilbert offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Gilbert as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. John M. Gilbert see?
CMS counts 620 Medicare patients who saw Dr. Gilbert in 2024, with an average age of 76.
Is Dr. John M. Gilbert board certified?
Yes. Dr. Gilbert is board certified in endocrinology, diabetes and metabolism by the American Board of Internal Medicine.
What services does Dr. John M. Gilbert bill to Medicare?
In 2024, Dr. Gilbert's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and medical service (95251).
Where did Dr. John M. Gilbert go to medical school?
Dr. Gilbert graduated from SUNY Downstate Health Sciences University in 1983.
What drugs does Dr. John M. Gilbert prescribe most?
In 2024 Medicare Part D data, Dr. Gilbert's most prescribed drugs by claims were Levothyroxine Sodium, Metformin HCl ER and Ozempic.
Has Dr. John M. Gilbert received payments from drug or device companies?
CMS Open Payments shows $662,210 in general payments to Dr. Gilbert from 54 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. John M. Gilbert been practicing?
Dr. Gilbert graduated from medical school in 1983, 43 years ago.
What insurance does Dr. John M. Gilbert accept?
Dr. Gilbert is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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