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DR. KARL M. UNKENHOLZ M.D.
NPI 1215914429
Emergency Medicine in Potsdam, NY

Active since December 29, 2005PECOS EnrolledAccepts Medicare Assignment
50 LEROY ST, POTSDAM, NY 13676(315) 265-3300(315) 261-6025 Get Directions Write a Review

NPPES record last updated: January 7, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 7, 2025, Mar 31, 2021, May 29, 2020 (3 updates tracked since 2020).

About Dr. Karl M. Unkenholz M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KARL M. UNKENHOLZ M.D. (NPI 1215914429) is an individual emergency medicine provider in Potsdam, New York, licensed in New Mexico (MD2019-0916) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Presbyterian Hospital, and maintains a secondary practice location in Salt Lake City.

NPPES Registry Identity

NPI1215914429
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. KARL M. UNKENHOLZCredential: M.D.
Location Address50 LEROY STPotsdam, NY 13676-1786
Mailing Address50 Leroy StPotsdam, NY 13676-1786 · (315) 265-3300 · Fax (315) 261-6025
Phone(315) 265-3300
Fax(315) 261-6025
Sole ProprietorYes
Medical School CMSOtherGraduated 1994
Enumeration DateDecember 29, 2005
Last NPPES UpdateJanuary 7, 20253 updates tracked since enumeration
NPPES CertifiedJanuary 7, 2025
✔ NPI 1215914429 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in NM · MD2019-0916✔ Licensed in HI · MD14392✔ Licensed in CA · C53154✔ Licensed in NY · 207725-1
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
50 LEROY ST, Potsdam, NY 13676
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Secondary Practice Location 1

Location 1275 E 200 SSalt Lake City, UT 84111-2002 · Phone (800) 336-1884

Other Identifiers 2

Medicaid01801445NY
Other686V11NY · Bluecross Blueshield

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Karl M. Unkenholz M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1759476492
PECOS Enrollment IDI20100220000029, I20220810001889
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

13

Medicare enrollment records show Karl Unkenholz reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Canton-Potsdam Hospital
Same address
General Acute Care Hospital
50 LEROY STREET
Potsdam, NY 13676
  • Reassigned Medicare billing, New York enrollment
  • 414 clinicians in this Medicare group
NPI 1568548782 (315) 265-3300
Massena Hospital Inc
18 mi
Critical Access
1 HOSPITAL DR
Massena, NY 13662
  • Reassigned Medicare billing, New York enrollment
  • 176 clinicians in this Medicare group
NPI 1972604460 (315) 769-4200
Gouverneur Hospital
33 mi
Critical Access
77 W BARNEY ST
Gouverneur, NY 13642
  • Reassigned Medicare billing, New York enrollment
  • 143 clinicians in this Medicare group
NPI 1295156412 (315) 287-1000
Gloversville Emergency Medicine Services PC
116 mi
Emergency Medicine
99 E STATE ST
Gloversville, NY 12078
  • Reassigned Medicare billing, New York enrollment
  • 57 clinicians in this Medicare group
NPI 1518205491 (800) 893-9698
Chenango Memorial Hospital, Inc
150 mi
Skilled Nursing Facility
179 N BROAD ST
Norwich, NY 13815
  • Reassigned Medicare billing, New York enrollment
  • 204 clinicians in this Medicare group
NPI 1063425643 (607) 337-4111
Coney Island Medical Practice Plan, P.C.
287 mi
General Practice
2601 OCEAN PKWY
Brooklyn, NY 11235
  • Reassigned Medicare billing, New York enrollment
  • 638 clinicians in this Medicare group
NPI 1386951762 (718) 616-5354
Ess Hospitalist LLC
1,207 mi
Hospitalist
1015 UNITY RD
Crossett, AR 71635
  • Reassigned Medicare billing, New Mexico enrollment
  • 114 clinicians in this Medicare group
NPI 1881967305 (866) 931-8882
Emergency Staffing Solutions Inc
1,348 mi
Emergency Medicine
240 HIGHLAND DR
Many, LA 71449
  • Reassigned Medicare billing, New Mexico enrollment
  • 152 clinicians in this Medicare group
NPI 1477590974 (318) 256-5691
Summit Emergency Medicine LLC
1,706 mi
Emergency Medicine
104 LEGION DR
Las Vegas, NM 87701
  • Reassigned Medicare billing, New Mexico enrollment
  • 14 clinicians in this Medicare group
NPI 1679112130 (505) 426-3930
Marcus Daly Memorial Hospital Corporation
1,882 mi
Rural Health
3975 US HIGHWAY 93 N
Stevensville, MT 59870
  • Reassigned Medicare billing, Montana enrollment
  • Also billed through NPI 1659475846 (Montana)
  • 154 clinicians in this Medicare group
NPI 1346337664 (406) 777-6002

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
96 services90 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
64 services63 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
32 services31 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
12 services12 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Presbyterian Hospital

Acute Care Hospitals · Albuquerque, NM
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number320021
Location1100 Central Avenue SEAlbuquerque, NM 87106 · Bernalillo County
Emergency services Birthing friendly

Three Crosses Regional Hospital LLC

Acute Care Hospitals · Las Cruces, NM
OwnershipProprietary
CMS Certification Number320091
Location2560 Samaritan DriveLas Cruces, NM 88001 · Dona Ana County
Emergency services

Alta Vista Regional Hospital

Critical Access Hospitals · Las Vegas, NM
OwnershipProprietary
CMS Certification Number321312
Location104 Legion DriveLas Vegas, NM 87701 · San Miguel County
Emergency services

Chenango Memorial Hospital

Acute Care Hospitals · Norwich, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330033
Location179 North Broad StreetNorwich, NY 13815 · Chenango County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 13676 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JULIE LYNN LAWLESS LCSW
Social Worker (Clinical)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
DR. KYLE FLINT PHARMD, RPH
Pharmacist
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
HEATHER MACKINNON
Physician Assistant
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
KARYN SULLIVAN PA
Emergency Medicine
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 782-2620
COREEN BOHL MSW, LCSW, ACHP-SW
Social Worker (Clinical)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
KELSEY MILLER
Pharmacist
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 261-5511
CHRISTINA KASHMER PA
Physician Assistant
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300
YASMEEN ZAIDI MS
Counselor (Mental Health)
50 LEROY ST
POTSDAM, NY 13676
St. Lawrence County (315) 265-3300

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karl Unkenholz's NPI number?

The NPI number for Karl Unkenholz is 1215914429. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Where is Karl Unkenholz located?

Karl Unkenholz practices at 50 Leroy St, Potsdam, NY 13676. The listed phone number is (315) 265-3300.

What is Karl Unkenholz's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Karl Unkenholz enrolled in Medicare?

Yes. Karl Unkenholz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Karl Unkenholz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karl Unkenholz reassigns Medicare benefits to 13 organizations: Canton-Potsdam Hospital (Potsdam, NY), Massena Hospital Inc (Massena, NY), Gouverneur Hospital (Gouverneur, NY), Gloversville Emergency Medicine Services PC (Gloversville, NY), Chenango Memorial Hospital, Inc (Norwich, NY) and 8 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karl Unkenholz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karl Unkenholz accept?

Health plans from Blue Cross and Blue Shield of Montana list Karl Unkenholz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Karl Unkenholz affiliated with any hospitals?

According to CMS data, Karl Unkenholz is affiliated with Presbyterian Hospital, Three Crosses Regional Hospital LLC, Alta Vista Regional Hospital and Chenango Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Karl Unkenholz was last updated on January 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.