Dr. Timothy M. Niessen, MD, MPH
- Medicare services, 2024
- 13
- Medicare patients, 2024
- 22
- MIPS score, 2024
- 83
- Hospital affiliations
- 1
- Industry payments
- $229
- Practice address
- 901 Harry S Truman N Dr, Upper Marlboro, MD 20774
- Practice phone
- Call (240) 677-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UM Capital Region Medical Center
Upper Marlboro, Maryland
Find Dr. Niessen'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. Timothy M. Niessen is an internist in Upper Marlboro, Maryland
Dr. Niessen practices at UM Capital Region Medical Center in Upper Marlboro, Maryland.
Dr. Niessen's NPI, 1730322900, was assigned on April 16, 2009. Dr. Niessen graduated from Johns Hopkins University School of Medicine in 2009. Dr. Niessen holds Maryland license D0074245.
- NPI
- 1730322900NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668638842
- NPI enumeration date
- April 16, 2009
- NPI status
- Active
- Practice phone
- (240) 677-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Timothy M. Niessen practices at UM Capital Region Medical Center in Upper Marlboro, Maryland
Dr. Niessen's primary practice is UM Capital Region Medical Center, at 901 Harry S Truman N Dr, Upper Marlboro, MD 20774 in Prince Georges County. The practice phone is (240) 677-3000.
- UM Capital Region Medical Center901 Harry S Truman N Dr, Upper Marlboro, MD 20774 · Prince Georges CountyPhone(240) 677-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Timothy M. Niessen is affiliated with 2 sites of care and 2 medical groups
Dr. Niessen's primary practice is UM Capital Region Medical Center in Upper Marlboro, Maryland. Dr. Niessen is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Niessen to 1 more medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy M. Niessen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Niessen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UM Capital Region Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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. Timothy M. Niessen is one of 3,320 internists in Maryland
Internal medicine is Dr. Niessen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Niessen is licensed in Maryland.
Specialties and state licenses
- Internal medicine, MarylandPrimary
Internists near Dr. Niessen
Counts of internists 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. Timothy M. Niessen billed Medicare for 13 services in 2024
CMS data shows 13 Medicare services from Dr. Niessen across 1 procedure code in 2024, for 22 Medicare patients. Medicare paid $1,808 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Niessen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 182024: 1328%
Dr. Niessen compared with the Maryland median for internists, 2024
- Dr. Niessen
- Maryland median
- Medicare services
- 13vs 65698% below
- Medicare patients
- 22vs 25191% below
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Niessen'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. Niessen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Niessen and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy M. Niessen treated 22 Medicare patients in 2024, average age 72
CMS counts 22 Medicare patients who saw Dr. Niessen in 2024. 75% of them have diabetes, and 75% have high blood pressure. Their average risk score is 4.25, 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. Niessen's median patient age at 68, with 53% women.
Dr. Niessen's Medicare patients by sex, 2024
- Women1150%
- Men1150%
Chronic conditions among Dr. Niessen's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Arthritis68%
- Chronic kidney disease64%
- Heart failure64%
- Mood disorders55%
Share of Medicare patients with each condition. A patient can have several.
Dr. Niessen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy M. Niessen scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Niessen for performance year 2024, reported as part of a group.
Dr. Niessen's MIPS scores, performance year 2024
- 83of 100Final score
- 73.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Timothy M. Niessen received $229 in industry payments from 2016 to 2019
CMS Open Payments shows 3 general payments to Dr. Niessen from 3 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $100.
General payments to Dr. Niessen by program year, 2016 to 2019
Companies that paid Dr. Niessen the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Timothy M. Niessen graduated from Johns Hopkins University School of Medicine
Dr. Niessen graduated from Johns Hopkins University School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy M. Niessen'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 | Clinician Public Reporting: Overall MIPS Performance (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. Timothy M. Niessen
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. Timothy M. Niessen's NPI number?
Dr. Timothy M. Niessen's NPI number is 1730322900. It was assigned on April 16, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy M. Niessen?
Dr. Timothy M. Niessen is an internist in Upper Marlboro, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Timothy M. Niessen practice?
Dr. Niessen practices at 901 Harry S Truman N Dr, Upper Marlboro, MD 20774. Dr. Niessen's primary practice is UM Capital Region Medical Center in Upper Marlboro, Maryland. Dmand AI also links Dr. Niessen to 1 medical group.
What is Dr. Timothy M. Niessen's office phone number?
The practice phone on file for Dr. Niessen is (240) 677-3000.
What is Dr. Timothy M. Niessen's medical license number?
Dr. Niessen holds Maryland license D0074245.
Which hospitals is Dr. Timothy M. Niessen affiliated with?
Dr. Niessen is affiliated with The Johns Hopkins Hospital.
What medical group is Dr. Timothy M. Niessen part of?
Dr. Niessen is linked to Johns Hopkins University. Dmand AI links Dr. Niessen to 1 more medical group.
Does Dr. Timothy M. Niessen accept Medicare?
Yes. CMS data shows Dr. Niessen billed Medicare for 13 services in 2024.
What is Dr. Timothy M. Niessen's MIPS score?
Dr. Niessen's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
How many Medicare patients does Dr. Timothy M. Niessen see?
CMS counts 22 Medicare patients who saw Dr. Niessen in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Timothy M. Niessen bill to Medicare?
In 2024, Dr. Niessen's most billed Medicare services were hospital inpatient care (99223).
Where did Dr. Timothy M. Niessen go to medical school?
Dr. Niessen graduated from Johns Hopkins University School of Medicine in 2009.
Has Dr. Timothy M. Niessen received payments from drug or device companies?
CMS Open Payments shows $229 in general payments to Dr. Niessen from 3 companies from 2016 to 2019. The largest total came from Boston Scientific Corporation.
How long has Dr. Timothy M. Niessen been practicing?
Dr. Niessen graduated from medical school in 2009, 17 years ago.
Selling to internal medicine practices?
See internists in Maryland 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