Dr. Maria Grig, MD
- Medicare services, 2024
- 17
- Medicare patients, 2024
- 50
- Hospital affiliations
- 1
- Medical groups
- 3
- State license
- 1
- Practice address
- 9965 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente - Fontana Medical Center
Fontana, California
Find Dr. Grig'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. Maria Grig is an anesthesiologist in Fontana, California
Dr. Grig practices at Kaiser Permanente - Fontana Medical Center in Fontana, California.
Dr. Grig's NPI, 1801453246, was assigned on May 21, 2019. Dr. Grig graduated from Vanderbilt University School of Medicine in 2019. Dr. Grig holds Massachusetts license 1018024.
- NPI
- 1801453246NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183069743
- NPI enumeration date
- May 21, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maria Grig practices at Kaiser Permanente - Fontana Medical Center in Fontana, California
Dr. Grig's primary practice is Kaiser Permanente - Fontana Medical Center, at 9965 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Kaiser Permanente - Fontana Medical Center9965 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Maria Grig is affiliated with 2 sites of care and 3 medical groups
Dr. Grig's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Dr. Grig is also affiliated with CHA Cambridge Hospital. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Grig to 2 more medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Maria Grig's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grig practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente - Fontana Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maria Grig is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Grig's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Grig is licensed in Massachusetts.
Specialties and state licenses
- Anesthesiology, MassachusettsPrimary
Anesthesiologists near Dr. Grig
Counts of anesthesiologists 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. Maria Grig billed Medicare for 17 services in 2024
CMS data shows 17 Medicare services from Dr. Grig across 1 procedure code in 2024, for 50 Medicare patients. Medicare paid $1,486 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grig compared with the California median for anesthesiologists, 2024
- Dr. Grig
- California median
- Medicare services
- 17vs 7276% below
- Medicare patients
- 50vs 14365% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Grig'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. Grig and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maria Grig treated 50 Medicare patients in 2024, average age 68
CMS counts 50 Medicare patients who saw Dr. Grig in 2024. The largest group is 65 to 74, with 27 patients. 68% of them have high blood pressure, and 52% have high cholesterol. 50% are also on Medicaid. Their average risk score is 1.12, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Grig's median patient age at 50, with 58% women.
Dr. Grig's Medicare patients by age, 2024
Dr. Grig's Medicare patients by sex, 2024
- Women2244%
- Men2856%
Chronic conditions among Dr. Grig's Medicare patients, 2024
- High blood pressure68%
- High cholesterol52%
- Mood disorders38%
- Arthritis36%
- Diabetes36%
- Anxiety34%
- Depression32%
- Tobacco use30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grig's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Maria Grig takes part in Medicare
Dr. Grig accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Maria Grig graduated from Vanderbilt University School of Medicine
Dr. Grig graduated from Vanderbilt University School of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Maria Grig'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Maria Grig
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. Maria Grig's NPI number?
Dr. Maria Grig's NPI number is 1801453246. It was assigned on May 21, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Maria Grig?
Dr. Maria Grig is an anesthesiologist in Fontana, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Maria Grig practice?
Dr. Grig practices at 9965 Sierra Ave, Fontana, CA 92335. Dr. Grig's primary practice is Kaiser Permanente - Fontana Medical Center in Fontana, California. Dmand AI also links Dr. Grig to 2 medical groups.
What is Dr. Maria Grig's office phone number?
The practice phone on file for Dr. Grig is (909) 427-5000.
What is Dr. Maria Grig's medical license number?
Dr. Grig holds Massachusetts license 1018024.
Which hospitals is Dr. Maria Grig affiliated with?
Dr. Grig is affiliated with CHA Cambridge Hospital.
What medical group is Dr. Maria Grig part of?
Dr. Grig is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Grig to 2 more medical groups.
Does Dr. Maria Grig accept Medicare?
Yes. CMS data shows Dr. Grig billed Medicare for 17 services in 2024, and Dr. Grig accepts Medicare assignment.
How many Medicare patients does Dr. Maria Grig see?
CMS counts 50 Medicare patients who saw Dr. Grig in 2024, with an average age of 68.
What services does Dr. Maria Grig bill to Medicare?
In 2024, Dr. Grig's most billed Medicare services were anesthesia (00812).
Where did Dr. Maria Grig go to medical school?
Dr. Grig graduated from Vanderbilt University School of Medicine in 2019.
How long has Dr. Maria Grig been practicing?
Dr. Grig graduated from medical school in 2019, 7 years ago.
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