Dr. Ronald G. Ungerer, MD
- Medicare services, 2024
- 288
- Medicare patients, 2024
- 148
- Part D claims, 2024
- 679
- Hospital affiliations
- 2
- Industry payments
- $950
- Practice address
- 34 Mark West Springs Road, Suite 100, Santa Rosa, CA 95403
- Practice phone
- Call (707) 541-3500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Santa Rosa Surgery and Endoscopy Center
Surgery Center - Medicare-Certified · Santa Rosa, California
Find Dr. Ungerer'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. Ronald G. Ungerer is a pulmonologist in Santa Rosa, California
Dr. Ungerer practices at Santa Rosa Surgery and Endoscopy Center in Santa Rosa, California.
Dr. Ungerer's NPI, 1255327813, was assigned on September 20, 2005. Dr. Ungerer graduated from University of California, Geffen School of Medicine in 1977. Dr. Ungerer holds California license G37435.
- NPI
- 1255327813NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365592912
- NPI enumeration date
- September 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (707) 541-3500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald G. Ungerer practices at Santa Rosa Surgery and Endoscopy Center in Santa Rosa, California
Dr. Ungerer's primary practice is Santa Rosa Surgery and Endoscopy Center, at 34 Mark West Springs Road, Suite 100, Santa Rosa, CA 95403. The practice phone is (707) 541-3500.
- Santa Rosa Surgery and Endoscopy Center34 Mark West Springs Road, Suite 100, Santa Rosa, CA 95403Phone(707) 541-3500
Source: Dmand AI Affiliation Data
Dr. Ronald G. Ungerer is affiliated with 4 sites of care and 1 medical group
Dr. Ungerer's primary practice is Santa Rosa Surgery and Endoscopy Center in Santa Rosa, California. Dr. Ungerer is also affiliated with Sutter Santa Rosa Regional Hospital. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Ungerer to 1 more hospital and 1 group practice or clinic, 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. Ronald G. Ungerer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ungerer practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Santa Rosa Surgery and Endoscopy Center | 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. Ronald G. Ungerer is one of 1,339 pulmonologists in California
Pulmonary disease is Dr. Ungerer's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Ungerer is licensed in California.
Specialties and state licenses
- Pulmonary disease, CaliforniaPrimary
Pulmonologists near Dr. Ungerer
Counts of pulmonologists 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. Ronald G. Ungerer billed Medicare for 288 services in 2024
CMS data shows 288 Medicare services from Dr. Ungerer across 3 procedure codes in 2024, all of them office visits, for 148 Medicare patients. Medicare paid $41,938 for them. Every service was in an office.
Dr. Ungerer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1332024: 288117%
Dr. Ungerer compared with the California median for pulmonologists, 2024
- Dr. Ungerer
- California median
- Medicare services
- 288vs 64956% below
- Medicare patients
- 148vs 27246% below
- Part D claims
- 558vs 42133% above
Medians across 1,263 pulmonologists in California with Dmand AI profiles that report each measure.
Dr. Ungerer'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. Ungerer and other pulmonologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald G. Ungerer treated 148 Medicare patients in 2024, average age 75
CMS counts 148 Medicare patients who saw Dr. Ungerer in 2024. The largest group is 65 to 74, with 65 patients. 73% of them have high cholesterol, and 68% have high blood pressure. 18% are also on Medicaid. Their average risk score is 1.49, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ungerer's median patient age at 70, with 51% women.
Dr. Ungerer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ungerer's Medicare patients by sex, 2024
- Women8658%
- Men6242%
Chronic conditions among Dr. Ungerer's Medicare patients, 2024
- High cholesterol73%
- High blood pressure68%
- COPD57%
- Arthritis48%
- Asthma34%
- Ischemic heart disease34%
- Mood disorders34%
- Depression30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ungerer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women51%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald G. Ungerer wrote 679 Medicare Part D claims in 2024
In 2024, Dr. Ungerer wrote 679 Medicare Part D claims for 142 patients. CMS names the drug for 558 of them, across 13 drugs with 11 or more claims each, at $225,384 in total drug cost. In 2023, CMS named 436 claims across 14 drugs.
Dr. Ungerer'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. Ungerer's Part D claims, 2024
- Antibiotics3%22 of 679 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: 4362024: 55828%
Drugs named by CMS: 13 in 2024, 14 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. Ronald G. Ungerer offers telehealth to Medicare patients
Dr. Ungerer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ungerer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ronald G. Ungerer received $950 in industry payments from 2016 to 2023
CMS Open Payments shows 101 general payments to Dr. Ungerer from 17 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 83% of the total. GlaxoSmithKline, LLC. paid the most, $240.
General payments to Dr. Ungerer by program year, 2016 to 2023
General payments to Dr. Ungerer by kind, 2016 to 2023
- Food and beverage$79083%
- Education$16017%
Companies that paid Dr. Ungerer the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ronald G. Ungerer graduated from University of California, Geffen School of Medicine
Dr. Ungerer graduated from University of California, Geffen School of Medicine in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ronald G. Ungerer'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. Ronald G. Ungerer
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. Ronald G. Ungerer's NPI number?
Dr. Ronald G. Ungerer's NPI number is 1255327813. It was assigned on September 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald G. Ungerer?
Dr. Ronald G. Ungerer is a pulmonologist in Santa Rosa, California. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. Ronald G. Ungerer practice?
Dr. Ungerer practices at 34 Mark West Springs Road, Suite 100, Santa Rosa, CA 95403. Dr. Ungerer's primary practice is Santa Rosa Surgery and Endoscopy Center in Santa Rosa, California. Dmand AI also links Dr. Ungerer to 1 hospital and 1 group practice or clinic.
What is Dr. Ronald G. Ungerer's office phone number?
The practice phone on file for Dr. Ungerer is (707) 541-3500.
What is Dr. Ronald G. Ungerer's medical license number?
Dr. Ungerer holds California license G37435.
Which hospitals is Dr. Ronald G. Ungerer affiliated with?
Dr. Ungerer is affiliated with Sutter Santa Rosa Regional Hospital. Dmand AI links Dr. Ungerer to 1 more hospital.
What medical group is Dr. Ronald G. Ungerer part of?
Dr. Ungerer is linked to Palo Alto Foundation Medical Group.
Does Dr. Ronald G. Ungerer accept Medicare?
Yes. CMS data shows Dr. Ungerer billed Medicare for 288 services in 2024, and Dr. Ungerer accepts Medicare assignment.
Does Dr. Ronald G. Ungerer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ungerer as offering telehealth services.
How many Medicare patients does Dr. Ronald G. Ungerer see?
CMS counts 148 Medicare patients who saw Dr. Ungerer in 2024, with an average age of 75.
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What services does Dr. Ronald G. Ungerer bill to Medicare?
In 2024, Dr. Ungerer's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99205).
Where did Dr. Ronald G. Ungerer go to medical school?
Dr. Ungerer graduated from University of California, Geffen School of Medicine in 1977.
What drugs does Dr. Ronald G. Ungerer prescribe most?
In 2024 Medicare Part D data, Dr. Ungerer's most prescribed drugs by claims were Trelegy Ellipta, Ipratropium Bromide and Montelukast Sodium.
Has Dr. Ronald G. Ungerer received payments from drug or device companies?
CMS Open Payments shows $950 in general payments to Dr. Ungerer from 17 companies from 2016 to 2023. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Ronald G. Ungerer been practicing?
Dr. Ungerer graduated from medical school in 1977, 49 years ago.
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