Dr. Ross Siegal Tanzer, DO
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 95
- Hospital affiliations
- 2
- Industry payments
- $48
- Medical groups
- 4
- Practice address
- 100 Michigan St NE, Grand Rapids, MI 49503
- Practice phone
- Call (616) 391-1774
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Tanzer'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. Ross Siegal Tanzer is an anesthesiologist in Grand Rapids, Michigan
Dr. Tanzer practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Dr. Tanzer's NPI, 1508362153, was assigned on April 3, 2018. Dr. Tanzer graduated from West Virginia School of Osteopathic Medicine in 2018. Dr. Tanzer holds Michigan license 5101026733.
- NPI
- 1508362153NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143601229
- NPI enumeration date
- April 3, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (616) 391-1774
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ross Siegal Tanzer practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan
Dr. Tanzer's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth, at 100 Michigan St NE, Grand Rapids, MI 49503 in Kent County. The practice phone is (616) 391-1774.
- Corewell Health Grand Rapids Hospitals - Butterworth100 Michigan St NE, Grand Rapids, MI 49503 · Kent CountyPhone(616) 391-1774
Source: Dmand AI Affiliation Data
Dr. Ross Siegal Tanzer is affiliated with 2 sites of care and 4 medical groups
Dr. Tanzer's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dr. Tanzer is also affiliated with University of Michigan Health-Sparrow Carson. The medical group on file is Corewell Health Medical Group West. Dmand AI also links Dr. Tanzer to 3 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. Ross Siegal Tanzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tanzer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Grand Rapids Hospitals - Butterworth | Available with a free account |
| +1 more site and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ross Siegal Tanzer is one of 1,302 anesthesiologists in Michigan
Anesthesiology is Dr. Tanzer's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Tanzer is licensed in Michigan.
Specialties and state licenses
- Anesthesiology, MichiganPrimary
Anesthesiologists near Dr. Tanzer
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. Ross Siegal Tanzer billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Tanzer across 1 procedure code in 2024, for 95 Medicare patients. Medicare paid $2,382 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tanzer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 182024: 1611%
Dr. Tanzer compared with the Michigan median for anesthesiologists, 2024
- Dr. Tanzer
- Michigan median
- Medicare services
- 16vs 8982% below
- Medicare patients
- 95vs 17746% below
Medians across 1,283 anesthesiologists in Michigan with Dmand AI profiles that report each measure.
Dr. Tanzer'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.
Need commercial claims for Dr. Tanzer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tanzer and other anesthesiologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ross Siegal Tanzer treated 95 Medicare patients in 2024, average age 68
CMS counts 95 Medicare patients who saw Dr. Tanzer in 2024. The largest group is 65 to 74, with 45 patients. 72% of them have high cholesterol, and 69% have high blood pressure. 24% are also on Medicaid. Their average risk score is 2.05, 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. Tanzer's median patient age at 61, with 57% women.
Dr. Tanzer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tanzer's Medicare patients by sex, 2024
- Women5962%
- Men3638%
Chronic conditions among Dr. Tanzer's Medicare patients, 2024
- High cholesterol72%
- High blood pressure69%
- Arthritis57%
- Anxiety47%
- Mood disorders40%
- Depression39%
- Diabetes31%
- Ischemic heart disease31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tanzer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Ross Siegal Tanzer takes part in Medicare
Dr. Tanzer 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. Ross Siegal Tanzer received $48 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. Tanzer from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $25.
Companies that paid Dr. Tanzer the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ross Siegal Tanzer graduated from West Virginia School of Osteopathic Medicine
Dr. Tanzer graduated from West Virginia School of Osteopathic Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ross Siegal Tanzer'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) |
| 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. Ross Siegal Tanzer
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. Ross Siegal Tanzer's NPI number?
Dr. Ross Siegal Tanzer's NPI number is 1508362153. It was assigned on April 3, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Ross Siegal Tanzer?
Dr. Ross Siegal Tanzer is an anesthesiologist in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Ross Siegal Tanzer practice?
Dr. Tanzer practices at 100 Michigan St NE, Grand Rapids, MI 49503. Dr. Tanzer's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dmand AI also links Dr. Tanzer to 3 medical groups.
What is Dr. Ross Siegal Tanzer's office phone number?
The practice phone on file for Dr. Tanzer is (616) 391-1774.
What is Dr. Ross Siegal Tanzer's medical license number?
Dr. Tanzer holds Michigan license 5101026733.
Which hospitals is Dr. Ross Siegal Tanzer affiliated with?
Dr. Tanzer practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan. Dr. Tanzer is also affiliated with University of Michigan Health-Sparrow Carson.
What medical group is Dr. Ross Siegal Tanzer part of?
Dr. Tanzer is linked to Corewell Health Medical Group West. Dmand AI links Dr. Tanzer to 3 more medical groups.
Does Dr. Ross Siegal Tanzer accept Medicare?
Yes. CMS data shows Dr. Tanzer billed Medicare for 16 services in 2024, and Dr. Tanzer accepts Medicare assignment.
How many Medicare patients does Dr. Ross Siegal Tanzer see?
CMS counts 95 Medicare patients who saw Dr. Tanzer in 2024, with an average age of 68.
What services does Dr. Ross Siegal Tanzer bill to Medicare?
In 2024, Dr. Tanzer's most billed Medicare services were anesthesia (00790).
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Where did Dr. Ross Siegal Tanzer go to medical school?
Dr. Tanzer graduated from West Virginia School of Osteopathic Medicine in 2018.
Has Dr. Ross Siegal Tanzer received payments from drug or device companies?
CMS Open Payments shows $48 in general payments to Dr. Tanzer from 2 companies from 2025 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Ross Siegal Tanzer been practicing?
Dr. Tanzer graduated from medical school in 2018, 8 years ago.
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