Dr. Thomas John Lang, MD
- Medicare services, 2024
- 57,644
- Medicare patients, 2024
- 535
- Part D claims, 2024
- 2,185
- MIPS score, 2024
- 90
- Hospital affiliations
- 1
- Practice address
- 4801 Dorsey Hall Dr, Ellicott City, MD 21042
- Practice phone
- Call (410) 992-7440
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arthritis Care Specialists of Maryland, P.A.
Ellicott City, Maryland
Find Dr. Lang'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. Thomas John Lang is a rheumatologist in Ellicott City, Maryland
Dr. Lang practices at Arthritis Care Specialists of Maryland, P.A. in Ellicott City, Maryland.
Dr. Lang's NPI, 1457312332, was assigned on March 30, 2006. Dr. Lang graduated from University of Maryland School of Medicine in 1993. Dr. Lang holds Maryland license D0052541.
- NPI
- 1457312332NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042228546
- NPI enumeration date
- March 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (410) 992-7440
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas John Lang practices at Arthritis Care Specialists of Maryland, P.A. in Ellicott City, Maryland
Dr. Lang's primary practice is Arthritis Care Specialists of Maryland, P.A., at 4801 Dorsey Hall Dr, Ellicott City, MD 21042 in Howard County. The practice phone is (410) 992-7440.
- Arthritis Care Specialists of Maryland, P.A.4801 Dorsey Hall Dr, Ellicott City, MD 21042 · Howard CountyPhone(410) 992-7440
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas John Lang is affiliated with 3 sites of care and 1 medical group
Dr. Lang's primary practice is Arthritis Care Specialists of Maryland, P.A. in Ellicott City, Maryland. Dr. Lang is also affiliated with Johns Hopkins Howard County Medical Center. The medical group on file is Arthritis Care Specialists of Maryland. Dmand AI also links Dr. Lang to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas John Lang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lang practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arthritis Care Specialists of Maryland, P.A. | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas John Lang is one of 177 rheumatologists in Maryland
Rheumatology is Dr. Lang's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Lang is licensed in Maryland.
Specialties and state licenses
- Rheumatology, MarylandPrimary
Rheumatologists near Dr. Lang
Counts of rheumatologists 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. Thomas John Lang billed Medicare for 57,644 services in 2024
CMS data shows 57,644 Medicare services from Dr. Lang across 32 procedure codes in 2024, for 535 Medicare patients. Medicare paid $556,763 for them. Every service was in an office.
Dr. Lang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 21,9472024: 52,813141%
- Lab and pathology
- 2023: 1,5772024: 1,72710%
- Office and hospital visits
- 2023: 1,0272024: 1,0916%
- Tests and treatments
- 2023: 7282024: 84816%
- Other services
- 2023: 292024: 6932290%
- Surgery
- 2023: 4302024: 47210%
Dr. Lang compared with the Maryland median for rheumatologists, 2024
- Dr. Lang
- Maryland median
- Medicare services
- 57,644vs 3,91514.7 times
- Medicare patients
- 535vs 30078% above
- Part D claims
- 1,964vs 7822.5 times
Medians across 168 rheumatologists in Maryland with Dmand AI profiles that report each measure.
Dr. Lang'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. Lang and other rheumatologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas John Lang treated 535 Medicare patients in 2024, average age 74
CMS counts 535 Medicare patients who saw Dr. Lang in 2024. The largest group is 65 to 74, with 235 patients. 75% of them have high cholesterol, and 73% have arthritis. 8% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lang's median patient age at 61, with 61% women.
Dr. Lang's Medicare patients by age, 2024
Dr. Lang's Medicare patients by sex, 2024
- Women38071%
- Men15529%
Chronic conditions among Dr. Lang's Medicare patients, 2024
- High cholesterol75%
- Arthritis73%
- High blood pressure71%
- Osteoporosis41%
- Diabetes28%
- Ischemic heart disease24%
- Chronic kidney disease22%
- Mood disorders22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lang'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
- Women61%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas John Lang wrote 2,185 Medicare Part D claims in 2024
In 2024, Dr. Lang wrote 2,185 Medicare Part D claims for 319 patients. 90% of them were for generic drugs. CMS names the drug for 1,964 of them, across 36 drugs with 11 or more claims each, at $1,101,614 in total drug cost. In 2023, CMS named 1,670 claims across 34 drugs.
Dr. Lang's Part D claims by kind of drug, 2024
- Generic1,957 claims90%
- Brand-name and other228 claims10%
Dr. Lang'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. Lang's Part D claims, 2024
- Opioids22%490 of 2,185 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: 1,6702024: 1,96418%
Drugs named by CMS: 36 in 2024, 34 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. Thomas John Lang scored 90 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Lang for performance year 2024, reported as part of a group. Dr. Lang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lang as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Lang's MIPS scores, performance year 2024
- 90of 100Final score
- 89.8of 100Quality
- 40of 100Improvement Activities
- 80of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Thomas John Lang received $41,481 in industry payments from 2016 to 2025
CMS Open Payments shows 1,961 general payments to Dr. Lang from 60 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 87% of the total. Amgen Inc. paid the most, $6,395.
General payments to Dr. Lang by program year, 2016 to 2025
General payments to Dr. Lang by kind, 2016 to 2025
- Food and beverage$36,05187%
- Consulting fees$2,9257%
- Travel and lodging$2,2876%
- Education$2171%
Companies that paid Dr. Lang the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas John Lang graduated from University of Maryland School of Medicine
Dr. Lang graduated from University of Maryland School of Medicine in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas John Lang'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 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)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. Thomas John Lang
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. Thomas John Lang's NPI number?
Dr. Thomas John Lang's NPI number is 1457312332. It was assigned on March 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas John Lang?
Dr. Thomas John Lang is a rheumatologist in Ellicott City, Maryland. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Thomas John Lang practice?
Dr. Lang practices at 4801 Dorsey Hall Dr, Ellicott City, MD 21042. Dr. Lang's primary practice is Arthritis Care Specialists of Maryland, P.A. in Ellicott City, Maryland. Dmand AI also links Dr. Lang to 1 group practice or clinic.
What is Dr. Thomas John Lang's office phone number?
The practice phone on file for Dr. Lang is (410) 992-7440.
What is Dr. Thomas John Lang's medical license number?
Dr. Lang holds Maryland license D0052541.
Which hospitals is Dr. Thomas John Lang affiliated with?
Dr. Lang is affiliated with Johns Hopkins Howard County Medical Center.
What medical group is Dr. Thomas John Lang part of?
Dr. Lang is linked to Arthritis Care Specialists of Maryland.
Does Dr. Thomas John Lang accept Medicare?
Yes. CMS data shows Dr. Lang billed Medicare for 57,644 services in 2024, and Dr. Lang accepts Medicare assignment.
Does Dr. Thomas John Lang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lang as offering telehealth services.
What is Dr. Thomas John Lang's MIPS score?
Dr. Lang's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Thomas John Lang see?
CMS counts 535 Medicare patients who saw Dr. Lang in 2024, with an average age of 74.
What services does Dr. Thomas John Lang bill to Medicare?
In 2024, Dr. Lang's most billed Medicare services were injected or infused drug (J0717), injected or infused drug (J0897) and office visit, established patient (99213).
Where did Dr. Thomas John Lang go to medical school?
Dr. Lang graduated from University of Maryland School of Medicine in 1993.
What drugs does Dr. Thomas John Lang prescribe most?
In 2024 Medicare Part D data, Dr. Lang's most prescribed drugs by claims were Prednisone, Methotrexate and Oxycodone HCl.
Has Dr. Thomas John Lang received payments from drug or device companies?
CMS Open Payments shows $41,481 in general payments to Dr. Lang from 60 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Thomas John Lang been practicing?
Dr. Lang graduated from medical school in 1993, 33 years ago.
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