Dr. Aaron Charniak, MD
- Medicare services, 2024
- 641
- Medicare patients, 2024
- 231
- Part D claims, 2024
- 87
- Hospital affiliations
- 3
- Medical groups
- 3
- Practice address
- 6701 North Charles Street, Baltimore, MD 21204
- Practice phone
- Call (443) 849-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Charniak'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. Aaron Charniak is a hospitalist in Towson, Maryland
Dr. Charniak practices at Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare.
Dr. Charniak's NPI, 1063827350, was assigned on June 25, 2014. Dr. Charniak holds New York license 289945.
- NPI
- 1063827350NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698040848
- NPI enumeration date
- June 25, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (443) 849-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Aaron Charniak practices at Greater Baltimore Medical Center in Baltimore, Maryland
Dr. Charniak's primary practice is Greater Baltimore Medical Center, at 6701 North Charles Street, Baltimore, MD 21204 in Baltimore County. The practice phone is (443) 849-2000.
- Greater Baltimore Medical Center6701 North Charles Street, Baltimore, MD 21204 · Baltimore CountyPhone(443) 849-2000
Source: Dmand AI Affiliation Data
Dr. Aaron Charniak is affiliated with 3 sites of care and 3 medical groups
Dr. Charniak's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. Dr. Charniak is also affiliated with Adventist HealthCare Shady Grove Medical Center. The medical group on file is MedStar Medical Group. Dmand AI also links Dr. Charniak to 1 more hospital and 2 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. Aaron Charniak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Charniak practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Baltimore Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | 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 GBMC HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Aaron Charniak is one of 415 hospitalists in Maryland
Hospitalist is Dr. Charniak's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dmand AI has Dr. Charniak's licenses on file in 2 states: New York and Maryland.
Specialties and state licenses
- Hospitalist, New YorkPrimary
- Internal medicine, Maryland
Hospitalists near Dr. Charniak
Counts of hospitalists 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. Aaron Charniak billed Medicare for 641 services in 2024
CMS data shows 641 Medicare services from Dr. Charniak across 4 procedure codes in 2024, for 231 Medicare patients. Medicare paid $49,908 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Charniak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8692024: 64126%
Dr. Charniak compared with the Maryland median for hospitalists, 2024
- Dr. Charniak
- Maryland median
- Medicare services
- 641vs 650Close to median
- Medicare patients
- 231vs 29121% below
- Part D claims
- 15vs 5673% below
Medians across 388 hospitalists in Maryland with Dmand AI profiles that report each measure.
Dr. Charniak'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. Charniak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Charniak and other hospitalists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Aaron Charniak treated 231 Medicare patients in 2024, average age 78
CMS counts 231 Medicare patients who saw Dr. Charniak in 2024. The largest group is 85 and over, with 74 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.36, 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. Charniak's median patient age at 77, with 51% women.
Dr. Charniak's Medicare patients by age, 2024
Dr. Charniak's Medicare patients by sex, 2024
- Women15266%
- Men7934%
Chronic conditions among Dr. Charniak's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis73%
- Mood disorders61%
- Depression52%
- Chronic kidney disease51%
- Anxiety48%
- Diabetes46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Charniak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Aaron Charniak wrote 87 Medicare Part D claims in 2024
In 2024, Dr. Charniak wrote 87 Medicare Part D claims for 41 patients. 89% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $160 in total drug cost. In 2022, CMS named 26 claims across 2 drugs.
Dr. Charniak's Part D claims by kind of drug, 2024
- Generic77 claims89%
- Brand-name and other10 claims11%
Dr. Charniak's most prescribed drugs by claims, 2023
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. Charniak's Part D claims, 2024
- Opioids13%11 of 87 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 262023: 1542%
Drugs named by CMS: 1 in 2023, 2 in 2022.
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
How Dr. Aaron Charniak takes part in Medicare
Dr. Charniak 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)
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.
Sources for Dr. Aaron Charniak'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) |
| 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. Aaron Charniak
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. Aaron Charniak's NPI number?
Dr. Aaron Charniak's NPI number is 1063827350. It was assigned on June 25, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Aaron Charniak?
Dr. Aaron Charniak is a hospitalist in Towson, Maryland. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Aaron Charniak practice?
Dr. Charniak practices at 6701 North Charles Street, Baltimore, MD 21204. Dr. Charniak's primary practice is Greater Baltimore Medical Center in Baltimore, Maryland, part of GBMC HealthCare. Dmand AI also links Dr. Charniak to 1 hospital and 2 medical groups.
What is Dr. Aaron Charniak's office phone number?
The practice phone on file for Dr. Charniak is (443) 849-2000.
What is Dr. Aaron Charniak's medical license number?
Dr. Charniak holds New York license 289945, one of the licenses on file in 2 states.
Which states has Dr. Aaron Charniak been licensed in?
Dmand AI has state licenses on file for Dr. Charniak in New York and Maryland.
Which hospitals is Dr. Aaron Charniak affiliated with?
Dr. Charniak practices at Greater Baltimore Medical Center in Baltimore, Maryland. Dr. Charniak is also affiliated with Adventist HealthCare Shady Grove Medical Center. Dmand AI links Dr. Charniak to 1 more hospital.
What medical group is Dr. Aaron Charniak part of?
Dr. Charniak is linked to MedStar Medical Group. Dmand AI links Dr. Charniak to 2 more medical groups.
Does Dr. Aaron Charniak accept Medicare?
Yes. CMS data shows Dr. Charniak billed Medicare for 641 services in 2024, and Dr. Charniak accepts Medicare assignment.
How many Medicare patients does Dr. Aaron Charniak see?
CMS counts 231 Medicare patients who saw Dr. Charniak in 2024, with an average age of 78.
Show 3 more questionsShow fewer questions
What services does Dr. Aaron Charniak bill to Medicare?
In 2024, Dr. Charniak's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
What drugs does Dr. Aaron Charniak prescribe most?
In 2023 Medicare Part D data, Dr. Charniak's most prescribed drugs by claims were Atorvastatin Calcium.
How long has Dr. Aaron Charniak been practicing?
Dr. Charniak graduated from medical school in 2014, 12 years ago.
Selling to hospitalist practices?
See hospitalists 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