Antibodies, AntinuclearAntibody AffinityAntigen-Antibody Complex
Dr. Robert Woodworth Shaffer, MD
NPI1083608640
- Medicare services, 2024
- 674
- Medicare patients, 2024
- 615
- Part D claims, 2021
- 12
- Publications
- 6
- Industry payments
- $55
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. Shaffer'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. Robert Woodworth Shaffer is an emergency medicine physician in Ann Arbor, Michigan
Dr. Shaffer practices at University Hospital in Ann Arbor, Michigan.
Dr. Shaffer's NPI, 1083608640, was assigned on September 9, 2005. Dr. Shaffer graduated from Geisel School of Medicine at Dartmouth in 1999. Dr. Shaffer holds Michigan license 4301074810.
NPI and contact details
- NPI
- 1083608640NPI Registry (opens in a new tab)
- NPI enumeration date
- September 9, 2005
- NPI status
- Active
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Robert Woodworth Shaffer practices at University Hospital in Ann Arbor, Michigan
Dr. Shaffer's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. Robert Woodworth Shaffer is affiliated with 1 site of care and 1 medical group
Dr. Shaffer's primary practice is University Hospital in Ann Arbor, Michigan. The medical group on file is University of Michigan Health. Dr. Shaffer's employer is on file too: a school & student health.
University HospitalPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Woodworth Shaffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shaffer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Shaffer practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Robert Woodworth Shaffer is one of 2,045 emergency medicine physicians in Michigan
Emergency medicine is Dr. Shaffer's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Shaffer's licenses on file in 2 states: Michigan and Massachusetts.
Specialties and state licenses
- Emergency medicine, MichiganPrimary
- Massachusetts license
Emergency medicine physicians near Dr. Shaffer
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. Robert Woodworth Shaffer billed Medicare for 674 services in 2024
CMS data shows 674 Medicare services from Dr. Shaffer across 5 procedure codes in 2024, for 615 Medicare patients. Medicare paid $83,752 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024674
Medicare patients615
Paid by Medicare$83,752
Procedure codes5
Dr. Shaffer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5412024: 65421%
- Tests and treatments
- 2023: 202024: 20No change
Dr. Shaffer compared with the Michigan median for emergency medicine physicians, 2024
- Dr. Shaffer
- Michigan median
- Medicare services
- 674vs 2342.9 times
- Medicare patients
- 615vs 2142.9 times
- Part D claims
- 12vs 4674% below
Medians across 1,937 emergency medicine physicians in Michigan with Dmand AI profiles that report each measure.
Dr. Shaffer'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. Shaffer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shaffer and other emergency medicine physicians in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Woodworth Shaffer treated 615 Medicare patients in 2024, average age 68
CMS counts 615 Medicare patients who saw Dr. Shaffer in 2024. The largest group is 65 to 74, with 206 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 34% are also on Medicaid. Their average risk score is 2.64, 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. Shaffer's median patient age at 52, with 54% women.
Medicare patients, 2024615
Average age68
Average risk score2.64
Also on Medicaid34%
Dr. Shaffer's Medicare patients by age, 2024
Dr. Shaffer's Medicare patients by sex, 2024
- Women33054%
- Men28546%
Chronic conditions among Dr. Shaffer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Arthritis48%
- Chronic kidney disease48%
- Mood disorders48%
- Anxiety47%
- Depression45%
- Diabetes42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Shaffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Woodworth Shaffer wrote 12 Medicare Part D claims in 2021
In 2021, Dr. Shaffer wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $77 in total drug cost. In 2020, CMS named 11 claims across 1 drug.
Part D claims, 202112
Drugs named by CMS1
Total drug cost$77
Dr. Shaffer's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 112021: 129%
Drugs named by CMS: 1 in 2021, 1 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Find emergency medicine physicians like Dr. Shaffer by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Robert Woodworth Shaffer has 6 publications on record
Dmand AI links 6 papers to Dr. Shaffer, published from 2013 to 2021. 2019 was the busiest year, with 3. The most frequent topics are Brain, Disease Models, Animal and Lafora Disease. Dr. Shaffer's most frequent co-authors are Zhengqiu Zhou, Rishitha Bollam, MD and Lance Johnson, MD.
Papers6
Years published2013 to 2021
Dr. Shaffer's papers by year, 2013 to 2021
Topics Dr. Shaffer writes about most
- Brain
- Disease Models, Animal
- Lafora Disease
- Mice, Knockout
Dr. Shaffer's most frequent co-authors
Recent publications by Dr. Shaffer
BrainCells, CulturedDisease Models, Animal
Trends Mol Med
AntibodiesEnzyme TherapyGlycogen Storage Disease
Artificial Gene FusionBrainDisease Models, Animal
See who Dr. Shaffer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shaffer works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert Woodworth Shaffer received $55 in industry payments in 2024
CMS Open Payments shows 3 general payments to Dr. Shaffer from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Phathom Pharmaceuticals, Inc. paid the most, $55.
Companies that paid Dr. Shaffer the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Woodworth Shaffer graduated from Geisel School of Medicine at Dartmouth
Dr. Shaffer graduated from Geisel School of Medicine at Dartmouth in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Woodworth Shaffer'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Robert Woodworth Shaffer
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. Robert Woodworth Shaffer's NPI number?
Dr. Robert Woodworth Shaffer's NPI number is 1083608640. It was assigned on September 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Woodworth Shaffer?
Dr. Robert Woodworth Shaffer is an emergency medicine physician in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Robert Woodworth Shaffer practice?
Dr. Shaffer practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. Shaffer's primary practice is University Hospital in Ann Arbor, Michigan.
What is Dr. Robert Woodworth Shaffer's office phone number?
The practice phone on file for Dr. Shaffer is (734) 936-4000.
What is Dr. Robert Woodworth Shaffer's medical license number?
Dr. Shaffer holds Michigan license 4301074810, one of the licenses on file in 2 states.
Which states has Dr. Robert Woodworth Shaffer been licensed in?
Dmand AI has state licenses on file for Dr. Shaffer in Michigan and Massachusetts.
What medical group is Dr. Robert Woodworth Shaffer part of?
Dr. Shaffer is linked to University of Michigan Health.
Does Dr. Robert Woodworth Shaffer accept Medicare?
Yes. CMS data shows Dr. Shaffer billed Medicare for 674 services in 2024.
How many Medicare patients does Dr. Robert Woodworth Shaffer see?
CMS counts 615 Medicare patients who saw Dr. Shaffer in 2024, with an average age of 68.
What services does Dr. Robert Woodworth Shaffer bill to Medicare?
In 2024, Dr. Shaffer's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and emergency department visit (99283).
Show 6 more questionsShow fewer questions
Where did Dr. Robert Woodworth Shaffer go to medical school?
Dr. Shaffer graduated from Geisel School of Medicine at Dartmouth in 1999.
What drugs does Dr. Robert Woodworth Shaffer prescribe most?
In 2021 Medicare Part D data, Dr. Shaffer's most prescribed drugs by claims were Atorvastatin Calcium.
Has Dr. Robert Woodworth Shaffer received payments from drug or device companies?
CMS Open Payments shows $55 in general payments to Dr. Shaffer from 1 company from 2024 to 2024. The largest total came from Phathom Pharmaceuticals, Inc.
How long has Dr. Robert Woodworth Shaffer been practicing?
Dr. Shaffer graduated from medical school in 1999, 27 years ago.
Does Dr. Robert Woodworth Shaffer do research?
Dmand AI links 6 publications to Dr. Shaffer, published from 2013 to 2021.
Who does Dr. Robert Woodworth Shaffer publish with?
Dr. Shaffer's most frequent co-authors are Zhengqiu Zhou (2 shared papers), Rishitha Bollam, MD (1 shared paper) and Lance Johnson, MD (1 shared paper).
Selling to emergency medicine practices?
See emergency medicine physicians in Michigan by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card