Dr. Stephen Maxwell Cerni, DO
- Medicare services, 2024
- 377
- Medicare patients, 2024
- 235
- Part D claims, 2024
- 148
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Practice address
- 5451 Walnut Ave, Chino, CA 91710
- Practice phone
- Call (909) 627-6111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Stephen Maxwell Cerni is an emergency medicine physician in Chino, California
Dr. Cerni practices at Chino Valley Medical Center in Chino, California, part of Prime Healthcare Services.
Dr. Cerni's NPI, 1720550783, was assigned on December 31, 2018. Dr. Cerni holds Pennsylvania license OT020236.
- NPI
- 1720550783NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123402179
- NPI enumeration date
- December 31, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 627-6111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Maxwell Cerni practices at Chino Valley Medical Center in Chino, California
Dr. Cerni's primary practice is Chino Valley Medical Center, at 5451 Walnut Ave, Chino, CA 91710 in San Bernardino County. The practice phone is (909) 627-6111.
- Chino Valley Medical Center5451 Walnut Ave, Chino, CA 91710 · San Bernardino CountyPhone(909) 627-6111
Source: Dmand AI Affiliation Data
Dr. Stephen Maxwell Cerni is affiliated with 3 sites of care and 5 medical groups
Dr. Cerni's primary practice is Chino Valley Medical Center in Chino, California, part of Prime Healthcare Services. Dr. Cerni is also affiliated with St. Luke's University Hospital - Bethlehem Campus. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Cerni to 1 more hospital and 4 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. Stephen Maxwell Cerni's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cerni practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Chino Valley Medical Center | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen Maxwell Cerni is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Cerni's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Cerni is licensed in Pennsylvania.
Specialties and state licenses
- Emergency medicine, PennsylvaniaPrimary
Emergency medicine physicians near Dr. Cerni
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. Stephen Maxwell Cerni billed Medicare for 377 services in 2024
CMS data shows 377 Medicare services from Dr. Cerni across 5 procedure codes in 2024, for 235 Medicare patients. Medicare paid $31,755 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Cerni's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 752024: 239219%
- Tests and treatments
- 2023: 242024: 89271%
- Imaging
- 2023: 02024: 49
Dr. Cerni compared with the California median for emergency medicine physicians, 2024
- Dr. Cerni
- California median
- Medicare services
- 377vs 26542% above
- Medicare patients
- 235vs 243Close to median
- Part D claims
- 62vs 62Close to median
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Cerni'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Maxwell Cerni treated 235 Medicare patients in 2024, average age 72
CMS counts 235 Medicare patients who saw Dr. Cerni in 2024. The largest group is 65 to 74, with 94 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 78% 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. Cerni's median patient age at 36, with 57% women.
Dr. Cerni's Medicare patients by age, 2024
Dr. Cerni's Medicare patients by sex, 2024
- Women12453%
- Men11147%
Chronic conditions among Dr. Cerni's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Diabetes57%
- Mood disorders49%
- Arthritis47%
- Anxiety46%
- Depression43%
- Chronic kidney disease40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cerni's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Maxwell Cerni wrote 148 Medicare Part D claims in 2024
In 2024, Dr. Cerni wrote 148 Medicare Part D claims for 95 patients. 95% of them were for generic drugs. CMS names the drug for 62 of them, across 4 drugs with 11 or more claims each, at $323 in total drug cost.
Dr. Cerni's Part D claims by kind of drug, 2024
- Generic140 claims95%
- Brand-name and other8 claims5%
Dr. Cerni'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. Cerni's Part D claims, 2024
- Antibiotics39%57 of 148 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Stephen Maxwell Cerni scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Cerni for performance year 2024, reported as part of a group. Dr. Cerni accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Cerni's MIPS scores, performance year 2024
- 100of 100Final score
- 88.8of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Dr. Stephen Maxwell Cerni'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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. Stephen Maxwell Cerni
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. Stephen Maxwell Cerni's NPI number?
Dr. Stephen Maxwell Cerni's NPI number is 1720550783. It was assigned on December 31, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Maxwell Cerni?
Dr. Stephen Maxwell Cerni is an emergency medicine physician in Chino, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Stephen Maxwell Cerni practice?
Dr. Cerni practices at 5451 Walnut Ave, Chino, CA 91710. Dr. Cerni's primary practice is Chino Valley Medical Center in Chino, California, part of Prime Healthcare Services. Dmand AI also links Dr. Cerni to 1 hospital and 4 medical groups.
What is Dr. Stephen Maxwell Cerni's office phone number?
The practice phone on file for Dr. Cerni is (909) 627-6111.
What is Dr. Stephen Maxwell Cerni's medical license number?
Dr. Cerni holds Pennsylvania license OT020236.
Which hospitals is Dr. Stephen Maxwell Cerni affiliated with?
Dr. Cerni practices at Chino Valley Medical Center in Chino, California. Dr. Cerni is also affiliated with St. Luke's University Hospital - Bethlehem Campus. Dmand AI links Dr. Cerni to 1 more hospital.
What medical group is Dr. Stephen Maxwell Cerni part of?
Dr. Cerni is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Cerni to 4 more medical groups.
Does Dr. Stephen Maxwell Cerni accept Medicare?
Yes. CMS data shows Dr. Cerni billed Medicare for 377 services in 2024, and Dr. Cerni accepts Medicare assignment.
What is Dr. Stephen Maxwell Cerni's MIPS score?
Dr. Cerni's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Stephen Maxwell Cerni see?
CMS counts 235 Medicare patients who saw Dr. Cerni in 2024, with an average age of 72.
Show 3 more questionsShow fewer questions
What services does Dr. Stephen Maxwell Cerni bill to Medicare?
In 2024, Dr. Cerni's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
What drugs does Dr. Stephen Maxwell Cerni prescribe most?
In 2024 Medicare Part D data, Dr. Cerni's most prescribed drugs by claims were Ondansetron ODT, Cephalexin and Amoxicillin-Clavulanate Potass.
How long has Dr. Stephen Maxwell Cerni been practicing?
Dr. Cerni graduated from medical school in 2020, 6 years ago.
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