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Dr. Joanna Mattis, MD
NPI1245626449PAC ID2264766807
- Medicare services, 2024
- 30
- Medicare patients, 2024
- 35
- Part D claims, 2024
- 628
- Publications
- 22
- Hospital affiliations
- 1
- 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
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Dr. Joanna Mattis is an epilepsy physician in Ann Arbor, Michigan
Dr. Mattis practices at University Hospital in Ann Arbor, Michigan.
Dr. Mattis' NPI, 1245626449, was assigned on April 14, 2015. Dr. Mattis graduated from Stanford University School of Medicine in 2015. Dr. Mattis holds Michigan license 4301506606.
NPI and contact details
- NPI
- 1245626449NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264766807
- NPI enumeration date
- April 14, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joanna Mattis practices at University Hospital in Ann Arbor, Michigan
Dr. Mattis' 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. Joanna Mattis is affiliated with 2 sites of care and 2 medical groups
Dr. Mattis' primary practice is University Hospital in Ann Arbor, Michigan. Dr. Mattis is also affiliated with University Hospital. The medical group on file is University of Michigan Health. Dmand AI also links Dr. Mattis to 1 more medical group, named with a free account. Dr. Mattis' 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. Joanna Mattis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mattis practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Joanna Mattis is one of 32 epilepsy physicians in Michigan
Epilepsy is Dr. Mattis' primary specialty in the NPI Registry, under taxonomy code 2084E0001X. Dmand AI has Dr. Mattis' licenses on file in 2 states: Michigan and Pennsylvania.
Specialties and state licenses
- Epilepsy, MichiganPrimary
- Neurology, Pennsylvania
Epilepsy physicians near Dr. Mattis
Counts of epilepsy 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. Joanna Mattis billed Medicare for 30 services in 2024
CMS data shows 30 Medicare services from Dr. Mattis across 1 procedure code in 2024, for 35 Medicare patients. Medicare paid $157 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202430
Medicare patients35
Paid by Medicare$157
Procedure codes1
Dr. Mattis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 612024: 3051%
- Office and hospital visits
- 2023: 142024: 0100%
Dr. Mattis compared with the Michigan median for epilepsy physicians, 2024
- Dr. Mattis
- Michigan median
- Medicare services
- 30vs 18784% below
- Medicare patients
- 35vs 11570% below
- Part D claims
- 574vs 42635% above
Medians across 30 epilepsy physicians in Michigan with Dmand AI profiles that report each measure.
Dr. Mattis' 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. Mattis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mattis and other epilepsy physicians in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joanna Mattis treated 35 Medicare patients in 2024, average age 65
CMS counts 35 Medicare patients who saw Dr. Mattis in 2024. The largest group is under 65, with 14 patients. 66% of them have high blood pressure, and 60% have high cholesterol. 46% are also on Medicaid. Their average risk score is 1.99, 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. Mattis' median patient age at 47, with 53% women.
Medicare patients, 202435
Average age65
Average risk score1.99
Also on Medicaid46%
Dr. Mattis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mattis' Medicare patients by sex, 2024
- Women1749%
- Men1851%
Chronic conditions among Dr. Mattis' Medicare patients, 2024
- High blood pressure66%
- High cholesterol60%
- Mood disorders49%
- Arthritis46%
- Depression46%
- Anxiety43%
- Chronic kidney disease40%
- Diabetes37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mattis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joanna Mattis wrote 628 Medicare Part D claims in 2024
In 2024, Dr. Mattis wrote 628 Medicare Part D claims for 58 patients. 82% of them were for generic drugs. CMS names the drug for 574 of them, across 19 drugs with 11 or more claims each, at $140,009 in total drug cost. In 2023, CMS named 321 claims across 12 drugs.
Part D claims, 2024628
Drugs named by CMS19
Total drug cost$140,009
Part D patients58
Dr. Mattis' Part D claims by kind of drug, 2024
- Generic512 claims82%
- Brand-name116 claims18%
Dr. Mattis' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3212024: 57479%
Drugs named by CMS: 19 in 2024, 12 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. Joanna Mattis offers telehealth to Medicare patients
Dr. Mattis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mattis as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Joanna Mattis has 22 publications on record
Dmand AI links 22 papers to Dr. Mattis, published from 2011 to 2025. 2024 was the busiest year, with 5. The most frequent topics are Optogenetics, Mice, Inbred C57BL and Mice, Transgenic. Dr. Mattis has published most often in bioRxiv. Dr. Mattis' most frequent co-authors are Emily A. Ferenczi, BM, B, CH, Erin Caitlin Conrad, MD and Lief Ericsson Fenno, MD.
Papers22
Years published2011 to 2025
Dr. Mattis' papers by year, 2011 to 2025
Topics Dr. Mattis writes about most
- Optogenetics
- Mice, Inbred C57BL
- Mice, Transgenic
- Neurons
- Disease Models, Animal
- Patch-Clamp Techniques
- Hippocampus
- Interneurons
Dr. Mattis' most frequent co-authors
- Emily A. Ferenczi, BM, B, CH2 shared papers
- Erin Caitlin Conrad, MD1 shared paper
- Lief Ericsson Fenno, MD1 shared paper
Recent publications by Dr. Mattis
AllelesDisease Models, AnimalEpilepsy
Ablation TechniquesEpilepsyHippocampus
See who Dr. Mattis researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mattis works with, so you can find a warm path to the right epilepsy physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Joanna Mattis graduated from Stanford University School of Medicine
Dr. Mattis graduated from Stanford University School of Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joanna Mattis'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Joanna Mattis
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. Joanna Mattis' NPI number?
Dr. Joanna Mattis' NPI number is 1245626449. It was assigned on April 14, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Joanna Mattis?
Dr. Joanna Mattis is an epilepsy physician in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Epilepsy Physician (taxonomy code 2084E0001X).
Where does Dr. Joanna Mattis practice?
Dr. Mattis practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. Mattis' primary practice is University Hospital in Ann Arbor, Michigan. Dmand AI also links Dr. Mattis to 1 medical group.
What is Dr. Joanna Mattis' office phone number?
The practice phone on file for Dr. Mattis is (734) 936-4000.
What is Dr. Joanna Mattis' medical license number?
Dr. Mattis holds Michigan license 4301506606, one of the licenses on file in 2 states.
Which states has Dr. Joanna Mattis been licensed in?
Dmand AI has state licenses on file for Dr. Mattis in Michigan and Pennsylvania.
Which hospitals is Dr. Joanna Mattis affiliated with?
Dr. Mattis is affiliated with University Hospital.
What medical group is Dr. Joanna Mattis part of?
Dr. Mattis is linked to University of Michigan Health. Dmand AI links Dr. Mattis to 1 more medical group.
Does Dr. Joanna Mattis accept Medicare?
Yes. CMS data shows Dr. Mattis billed Medicare for 30 services in 2024, and Dr. Mattis accepts Medicare assignment.
Does Dr. Joanna Mattis offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mattis as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Joanna Mattis see?
CMS counts 35 Medicare patients who saw Dr. Mattis in 2024, with an average age of 65.
What services does Dr. Joanna Mattis bill to Medicare?
In 2024, Dr. Mattis' most billed Medicare services were heart test or procedure (93042).
Where did Dr. Joanna Mattis go to medical school?
Dr. Mattis graduated from Stanford University School of Medicine in 2015.
What drugs does Dr. Joanna Mattis prescribe most?
In 2024 Medicare Part D data, Dr. Mattis' most prescribed drugs by claims were Levetiracetam, Clobazam and Lacosamide.
How long has Dr. Joanna Mattis been practicing?
Dr. Mattis graduated from medical school in 2015, 11 years ago.
Does Dr. Joanna Mattis do research?
Dmand AI links 22 publications to Dr. Mattis, published from 2011 to 2025.
Who does Dr. Joanna Mattis publish with?
Dr. Mattis' most frequent co-authors are Emily A. Ferenczi, BM, B, CH (2 shared papers), Erin Caitlin Conrad, MD (1 shared paper) and Lief Ericsson Fenno, MD (1 shared paper).
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