Dr. Daniel Mark Gromis, MD
- Medicare services, 2024
- 558
- Medicare patients, 2024
- 391
- Part D claims, 2024
- 668
- Hospital affiliations
- 1
- Industry payments
- $137
- Practice address
- 1100 West Stewart Dr, Orange, CA 92868
- Practice phone
- Call (714) 633-9111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gromis' professional email, personal email and mobile number
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Dr. Daniel Mark Gromis is an emergency medicine physician in Orange, California
Dr. Gromis practices at Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services.
Dr. Gromis' NPI, 1487883146, was assigned on July 2, 2009. Dr. Gromis graduated from UC Irvine School of Medicine in 2009. Dr. Gromis holds California license A120000.
- NPI
- 1487883146NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335314509
- NPI enumeration date
- July 2, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 633-9111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Mark Gromis practices at Providence St. Joseph Hospital Orange in Orange, California
Dr. Gromis' primary practice is Providence St. Joseph Hospital Orange, at 1100 West Stewart Dr, Orange, CA 92868 in Orange County. The practice phone is (714) 633-9111.
- Providence St. Joseph Hospital Orange1100 West Stewart Dr, Orange, CA 92868 · Orange CountyPhone(714) 633-9111
Source: Dmand AI Affiliation Data
Dr. Daniel Mark Gromis is affiliated with 1 site of care and 5 medical groups
Dr. Gromis' primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services. The medical group on file is Emergency Medicine Specialists of Orange County. Dmand AI also links Dr. Gromis to 4 more 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. Daniel Mark Gromis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gromis practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Joseph Hospital Orange | Available with a free account |
| +4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Providence Health & Services and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Daniel Mark Gromis is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Gromis' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Gromis is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Gromis' licenses on file in 3 states: California, Illinois and Indiana.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Illinois license
- Indiana license
Emergency medicine physicians near Dr. Gromis
Counts of emergency medicine 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. Daniel Mark Gromis billed Medicare for 558 services in 2024
CMS data shows 558 Medicare services from Dr. Gromis across 4 procedure codes in 2024, for 391 Medicare patients. Medicare paid $61,563 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gromis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3692024: 3926%
- Tests and treatments
- 2023: 1062024: 16657%
- Imaging
- 2023: 242024: 0100%
Dr. Gromis compared with the California median for emergency medicine physicians, 2024
- Dr. Gromis
- California median
- Medicare services
- 558vs 2652.1 times
- Medicare patients
- 391vs 24361% above
- Part D claims
- 452vs 627.3 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Gromis' 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. Gromis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gromis and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel Mark Gromis treated 391 Medicare patients in 2024, average age 76
CMS counts 391 Medicare patients who saw Dr. Gromis in 2024. The largest group is 75 to 84, with 136 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 44% are also on Medicaid. Their average risk score is 2.59, 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. Gromis' median patient age at 44, with 57% women.
Dr. Gromis' Medicare patients by age, 2024
Dr. Gromis' Medicare patients by sex, 2024
- Women22959%
- Men16241%
Chronic conditions among Dr. Gromis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Chronic kidney disease42%
- Diabetes42%
- Ischemic heart disease38%
- Mood disorders38%
- Anxiety34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gromis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel Mark Gromis wrote 668 Medicare Part D claims in 2024
In 2024, Dr. Gromis wrote 668 Medicare Part D claims for 364 patients. 94% of them were for generic drugs. CMS names the drug for 452 of them, across 13 drugs with 11 or more claims each, at $3,325 in total drug cost. In 2023, CMS named 390 claims across 11 drugs.
Dr. Gromis' Part D claims by kind of drug, 2024
- Generic630 claims94%
- Brand-name38 claims6%
Dr. Gromis' 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. Gromis' Part D claims, 2024
- Opioids3%21 of 668 claims
- Antibiotics14%91 of 668 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: 3902024: 45216%
Drugs named by CMS: 13 in 2024, 11 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
How Dr. Daniel Mark Gromis takes part in Medicare
Dr. Gromis 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. Daniel Mark Gromis received $137 in industry payments from 2016 to 2024
CMS Open Payments shows 7 general payments to Dr. Gromis from 3 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $97.
General payments to Dr. Gromis by program year, 2016 to 2024
Companies that paid Dr. Gromis the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel Mark Gromis graduated from UC Irvine School of Medicine
Dr. Gromis graduated from UC Irvine School of Medicine in 2009.
- Medical school
- Board certified in emergency medicine
- Board certified in rdms
Source: Dmand AI Professional Profile Data
Sources for Dr. Daniel Mark Gromis'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) |
| Industry payments | Open Payments (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. Daniel Mark Gromis
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. Daniel Mark Gromis' NPI number?
Dr. Daniel Mark Gromis' NPI number is 1487883146. It was assigned on July 2, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Mark Gromis?
Dr. Daniel Mark Gromis is an emergency medicine physician in Orange, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Daniel Mark Gromis practice?
Dr. Gromis practices at 1100 West Stewart Dr, Orange, CA 92868. Dr. Gromis' primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services. Dmand AI also links Dr. Gromis to 4 medical groups.
What is Dr. Daniel Mark Gromis' office phone number?
The practice phone on file for Dr. Gromis is (714) 633-9111.
What is Dr. Daniel Mark Gromis' medical license number?
Dr. Gromis holds California license A120000, one of the licenses on file in 3 states.
Which states has Dr. Daniel Mark Gromis been licensed in?
Dmand AI has state licenses on file for Dr. Gromis in California (2012 to 2026), Illinois (2009 to 2013) and Indiana (2011 to 2013).
Which hospitals is Dr. Daniel Mark Gromis affiliated with?
Dr. Gromis practices at Providence St. Joseph Hospital Orange in Orange, California.
What medical group is Dr. Daniel Mark Gromis part of?
Dr. Gromis is linked to Emergency Medicine Specialists of Orange County. Dmand AI links Dr. Gromis to 4 more medical groups.
Does Dr. Daniel Mark Gromis accept Medicare?
Yes. CMS data shows Dr. Gromis billed Medicare for 558 services in 2024, and Dr. Gromis accepts Medicare assignment.
How many Medicare patients does Dr. Daniel Mark Gromis see?
CMS counts 391 Medicare patients who saw Dr. Gromis in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
Is Dr. Daniel Mark Gromis board certified?
Yes. Dr. Gromis is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Daniel Mark Gromis bill to Medicare?
In 2024, Dr. Gromis' most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and critical care (99291).
Where did Dr. Daniel Mark Gromis go to medical school?
Dr. Gromis graduated from UC Irvine School of Medicine in 2009.
What drugs does Dr. Daniel Mark Gromis prescribe most?
In 2024 Medicare Part D data, Dr. Gromis' most prescribed drugs by claims were Naproxen, Famotidine and Diclofenac Sodium.
Has Dr. Daniel Mark Gromis received payments from drug or device companies?
CMS Open Payments shows $137 in general payments to Dr. Gromis from 3 companies from 2016 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Daniel Mark Gromis been practicing?
Dr. Gromis graduated from medical school in 2009, 17 years ago.
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