Mark Karolkowski
Occupational Therapist · Rockville, MD
Mark Karolkowski is an occupational therapist with a practice address in Rockville, Maryland, and NPI 1417342775, issued on Apr 3, 2015. Check the license with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Karolkowski
- Primary taxonomy
- Occupational Therapist 225X00000X
- Practice location
- 51 Monroe St, Rockville, MD 20850
- Phone
- (301) 838-2040
- Enumerated
- Apr 3, 2015
- Entity
- Type 1 · individual
Also registered at 51 Monroe St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Karolkowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
174 occupational therapist records list a Rockville practice address
They are 174 of the 14,353 NPPES records with a Rockville practice address, and 2,884 occupational therapist records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 174 in Rockville → All 2,884 in Maryland → Every provider in Rockville →
Other occupational therapist records in Maryland
- Amanda Aaron, OTR/LBaltimore, MD1659657526
- Carolyn Abad, OTDWaldorf, MD1508644246
- Jessica Abad, OTR/LCharlotte Hall, MD1508244054
- Ashley Abbott, OTR/LBaltimore, MD1558211557
- Kristin Abboud, OTAnnapolis, MD1073640405
- Beth Abell, MS, OTR/LDundalk, MD1629362256
- Maria Abella, OTR, CLTSilver Spring, MD1154421923
- Amanda Aberg, MS, OTR/L, CBISBaltimore, MD1518589621
- Victoria AbivaBaltimore, MD1104751627
- Catherine AblardBethesda, MD1942864814
Common questions
What is Mark Karolkowski's NPI number?
Mark Karolkowski's National Provider Identifier (NPI) is 1417342775, issued on Apr 3, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Mark Karolkowski located?
The NPPES record lists a practice address at 51 Monroe St, Rockville, MD, 20850. Phone: (301) 838-2040. Providers update this record themselves, so call before visiting.
How can I verify Mark Karolkowski's license?
Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.