Quick answers
- Does Karl J. Maki accept Medicare assignment?
- Yes. Medicare's clinician data says Karl J. Maki accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Karl J. Maki see?
- In 2024, CMS data shows 721 Original Medicare patients and 65,146 services for Karl J. Maki. This counts Original Medicare only and measures volume, not quality.
- What is Karl J. Maki's NPI number?
- 1639465883. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Karl J. Maki, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 721 |
|---|---|
| Services billed to Medicare | 65,146 |
| Different services or procedures | 48 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, onabotulinumtoxina, 1 unit (J0585)26,200 services
- Injection, incobotulinumtoxin a, 1 unit (J0588)10,350 services
- Injection, rimabotulinumtoxinb, 100 units (J0587)3,360 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)1,084 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)916 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure73%
- Arthritis53%
- Depression37%
- Anxiety36%
- Ischemic heart disease26%
Hospitals where Karl J. Maki works
Medicare's Facility Affiliation Data lists Karl J. Maki at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210023
- University of MD Shore Medical Center at EastonEaston, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 210037
Practice locations
Addresses where Karl J. Maki is enrolled with Medicare (CMS data updated October 2, 2026).
- 122 Defense Hwy, Suite 210Annapolis, MD 21401 (410) 266‑9694
Group practices
Medicare enrollment lists Karl J. Maki as a member of this group (CMS data updated October 2, 2026).
- Daniel Hexter MD PA7 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Annapolis
Clinicians with the same Medicare primary specialty in Annapolis, MD — not a recommendation.
Other clinicians in Daniel Hexter MD PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1639465883 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians