Dr. Gail Marks, MD
- Medicare services, 2017
- 18
- Part D claims, 2017
- 87
- Industry payments
- $1,378
- Insurance carriers
- 6
- State license
- 1
- Practice address
- 399 E Highland Ave, San Bernardino, CA 92404
- Practice phone
- Call (909) 886-5200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Apex Pediatrics Inc
San Bernardino, California
Find Dr. Marks' 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. Gail Marks is a pediatrician in San Bernardino, California
Dr. Marks practices at Apex Pediatrics Inc in San Bernardino, California.
Dr. Marks' NPI, 1700813698, was assigned on June 27, 2006. Dr. Marks graduated from UC Irvine School of Medicine in 1980. Dr. Marks holds California license G45659.
- NPI
- 1700813698NPI Registry (opens in a new tab)
- NPI enumeration date
- June 27, 2006
- NPI status
- Active
- Practice phone
- (909) 886-5200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gail Marks practices at Apex Pediatrics Inc in San Bernardino, California
Dr. Marks' primary practice is Apex Pediatrics Inc, at 399 E Highland Ave, San Bernardino, CA 92404 in San Bernardino County. The practice phone is (909) 886-5200.
- Apex Pediatrics Inc399 E Highland Ave, San Bernardino, CA 92404 · San Bernardino CountyPhone(909) 886-5200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gail Marks is affiliated with 1 site of care
Dr. Marks' primary practice is Apex Pediatrics Inc in San Bernardino, California.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Gail Marks' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marks practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Apex Pediatrics Inc | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gail Marks is one of 8,236 pediatricians in California
Pediatrics is Dr. Marks' primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Marks is board certified in pediatrics by the American Board of Pediatrics. Dr. Marks is licensed in California.
Specialties and state licenses
- Pediatrics, CaliforniaPrimary
Pediatricians near Dr. Marks
Counts of pediatricians 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. Gail Marks billed Medicare for 18 services in 2017
CMS data shows 18 Medicare services from Dr. Marks across 1 procedure code in 2017, all of them office visits. Medicare paid $361 for them. Every service was in an office.
Dr. Marks' Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 422017: 1857%
- Other services
- 2016: 112017: 0100%
- Surgery
- 2016: 172017: 0100%
Dr. Marks compared with the California median for pediatricians, 2017
- Dr. Marks
- California median
- Medicare services
- 18vs 7074% below
- Part D claims
- 87vs 224.0 times
Medians across 807 pediatricians in California with Dmand AI profiles that report each measure.
Dr. Marks' most billed Medicare procedure codes, 2017
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. Marks and other pediatricians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gail Marks' patients have a median age of 9
Across all payers, Dmand AI patient panel data puts Dr. Marks' median patient age at 9, with 51% women.
Dr. Marks' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 9
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Gail Marks wrote 87 Medicare Part D claims in 2017
In 2017, Dr. Marks wrote 87 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $250 in total drug cost. In 2016, CMS named 16 claims across 1 drug.
Dr. Marks' most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 162017: 87444%
Drugs named by CMS: 5 in 2017, 1 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gail Marks received $1,378 in industry payments from 2018 to 2025
CMS Open Payments shows 69 general payments to Dr. Marks from 10 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 98% of the total. Cranial Technologies, Inc paid the most, $272.
General payments to Dr. Marks by program year, 2018 to 2025
General payments to Dr. Marks by kind, 2018 to 2025
- Food and beverage$1,35398%
- Speaker and faculty fees$252%
Companies that paid Dr. Marks the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gail Marks graduated from UC Irvine School of Medicine
Dr. Marks graduated from UC Irvine School of Medicine in 1980.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Gail Marks accepts plans from 6 insurance carriers
Dr. Marks is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- United Healthcare
Plan types Dr. Marks accepts, by number of carriers
- Medicare6
- PPO4
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gail Marks'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 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) |
| 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. Gail Marks
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. Gail Marks' NPI number?
Dr. Gail Marks' NPI number is 1700813698. It was assigned on June 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gail Marks?
Dr. Gail Marks is a pediatrician in San Bernardino, California. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Gail Marks practice?
Dr. Marks practices at 399 E Highland Ave, San Bernardino, CA 92404. Dr. Marks' primary practice is Apex Pediatrics Inc in San Bernardino, California.
What is Dr. Gail Marks' office phone number?
The practice phone on file for Dr. Marks is (909) 886-5200.
What is Dr. Gail Marks' medical license number?
Dr. Marks holds California license G45659.
Does Dr. Gail Marks accept Medicare?
Yes. CMS data shows Dr. Marks billed Medicare for 18 services in 2017.
Is Dr. Gail Marks board certified?
Yes. Dr. Marks is board certified in pediatrics by the American Board of Pediatrics.
What services does Dr. Gail Marks bill to Medicare?
In 2017, Dr. Marks' most billed Medicare services were office visit, established patient (99213).
Where did Dr. Gail Marks go to medical school?
Dr. Marks graduated from UC Irvine School of Medicine in 1980.
What drugs does Dr. Gail Marks prescribe most?
In 2017 Medicare Part D data, Dr. Marks' most prescribed drugs by claims were Simvastatin, Amlodipine Besylate and Metformin HCl.
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Has Dr. Gail Marks received payments from drug or device companies?
CMS Open Payments shows $1,378 in general payments to Dr. Marks from 10 companies from 2018 to 2025. The largest total came from Cranial Technologies, Inc.
How long has Dr. Gail Marks been practicing?
Dr. Marks graduated from medical school in 1980, 46 years ago.
What insurance does Dr. Gail Marks accept?
Dr. Marks is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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