NPPES file of Aug 9, 2026

Karl John Maki, M.D.

Neurology Physician · Annapolis, MD

Karl John Maki, M.D. is a neurology physician with a practice address in Annapolis, Maryland, and NPI 1639465883, issued on Jun 27, 2011. Check the license (Maryland D81220, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639465883
Name
Karl John Maki
Credential
M.D.
Primary taxonomy
Neurology Physician 2084N0400X
License number
D81220 MD
Self-reported in NPPES; status is on the state search
Practice location
122 Defense Hwy, Annapolis, MD 21401
Phone
(410) 266-9694
Enumerated
Jun 27, 2011
Record last updated
Jun 23, 2016 (not updated in 10 years: call before relying on the address or phone)
Fax
(410) 266-9695
Medicare enrollment
Enrolled (PECOS I20160516001943); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest neurology physician records → All 526 in Maryland → Look up another NPI →

Also registered at 122 Defense Hwy

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mark Baganz, M.D.Diagnostic Radiology Physician1982768966
  2. Kevin Berger, M.D.Diagnostic Radiology Physician1841248515
  3. Nicholas Capozzoli, M.D.Neurology Physician1871632232
  4. Maya Carter, MDNeurology Physician1437294113
  5. Alphonso Dial, M.D.Diagnostic Radiology Physician1396729505
  6. Eva Duckett, M.D.Diagnostic Radiology Physician1538144050

Verify Karl John Maki in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMaryland Board of Physicians
    Search for license D81220    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Maryland license search

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3.6 times the Medicare Part D claims of the average neurology physician in 2024

4,939 Medicare Part D claims for 603 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.

  1. Karl Maki4,939
  2. Specialty average1,370

Most prescribed

  1. Carbidopa-Levodopa998 claims
  2. Donepezil Hcl320 claims
  3. Gabapentin230 claims
  4. Rytary170 claims
  5. Amantadine167 claims
  6. Primidone163 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $5,416.47

250 payments; by number, the most common kind was food and beverage; the largest payer was Mdd US Operations, LLC. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karl Maki$5,416.47
  2. Specialty average$8,318.07

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Daniel Hexter MD PAAnnapolis, MD

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Karl John Maki among 526 neurology physician records in Maryland

Karl John Maki, M.D. is one of 526 neurology physician records with a practice address in Maryland. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 70% of them.

  • NPI issued2011 · 70% of these records are older, 27% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2015 · median 2004 among the 325 with a school on file
  • Record last updated2016 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurology Physician providers in Maryland

There are 526 neurology physician records in Maryland.

All 526 in Maryland → Every provider in Annapolis → Neurology Physician nationwide →

The 8 neurology physician records with the nearest ZIP codes

  1. Gurdeep Ahluwalia, M.D.Annapolis, MD 214011083818058
  2. Nicholas Capozzoli, M.D.Annapolis, MD 214011871632232
  3. Maya Carter, MDAnnapolis, MD 214011437294113
  4. Shariff Dunlap, M.D.Annapolis, MD 214011699063925
  5. Arash Farhadi, MDAnnapolis, MD 214011467619601
  6. Minas Gebru, MDAnnapolis, MD 214011548558703
  7. Morgan Harris, M.D.Annapolis, MD 214011801053574
  8. Daniel Hexter, M.D.Annapolis, MD 214011942224753

Common questions

What is Karl John Maki, M.D.'s NPI number?

Karl John Maki, M.D.'s National Provider Identifier (NPI) is 1639465883, issued on Jun 27, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Karl John Maki, M.D. located?

The NPPES record lists a practice address at 122 Defense Hwy, Annapolis, MD, 21401. Phone: (410) 266-9694. Providers update this record themselves, so call before visiting.

How can I verify Karl John Maki, M.D.'s license?

NPPES lists Maryland license number D81220, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Karl John Maki, M.D. prescribe under Medicare Part D?

In 2024, Karl John Maki, M.D. had 4,939 Medicare Part D claims for 603 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.