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MARK JAMES JOHNSON DO
NPI 1740783554
Internal Medicine in Kissimmee, FL

Active since March 18, 2018PECOS EnrolledAccepts Medicare Assignment
806 W OAK ST, KISSIMMEE, FL 34741(407) 483-3376(407) 201-7304 Get Directions Write a Review

NPPES record last updated: June 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 22, 2021, Jun 16, 2021, Mar 18, 2018 (3 updates tracked since 2018).

About Mark James Johnson Do NPPES

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

MARK JAMES JOHNSON DO (NPI 1740783554) is an individual internal medicine provider in Kissimmee, Florida, licensed in Florida (OS16811) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, is affiliated with Hca Florida Osceola Hospital, and is a graduate of Lake Erie College Of Osteopathic Medicine, Bradenton (2018).

NPPES Registry Identity

NPI1740783554
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMARK JAMES JOHNSONCredential: DO
Location Address806 W OAK STKissimmee, FL 34741-6625
Mailing Address806 W Oak StKissimmee, FL 34741-6625 · (074) 833-3376 · Fax (407) 201-7304
Phone(407) 483-3376
Fax(407) 201-7304
Sole ProprietorNo
Medical School CMSLake Erie College Of Osteopathic Medicine, BradentonGraduated 2018
Enumeration DateMarch 18, 2018
Last NPPES UpdateJune 22, 20213 updates tracked since enumeration
NPPES CertifiedJune 22, 2021
✔ NPI 1740783554 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in FL · OS16811
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
806 W OAK ST, Kissimmee, FL 34741
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Superior HealthPlan, Ambetter Health, Ambetter of Alabama and more.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

Mark James Johnson Do 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 ID2264834142
PECOS Enrollment IDI20210714003723
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

2

Medicare enrollment records show Mark Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Osceola Surgical Associates LLC
0.3 mi
Surgery
320 W BASS ST
Kissimmee, FL 34741
  • Reassigned Medicare billing, Florida enrollment
  • 68 clinicians in this Medicare group
NPI 1578723540 (407) 870-0808
Hospital Medicine Services Of Fl, LLC
178 mi
Hospitalist
20900 BISCAYNE BLVD
Aventura, FL 33180
  • Reassigned Medicare billing, Florida enrollment
  • 861 clinicians in this Medicare group
NPI 1710684857 (305) 682-7000

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 7

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
124 services51 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
82 services43 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
41 services40 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
39 services39 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
38 services33 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
19 services17 patients

Hospital Affiliations CMS Care Compare

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

Hca Florida Osceola Hospital

Acute Care Hospitals · Kissimmee, FL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number100110
Location700 West Oak StreetKissimmee, FL 34741 · Osceola County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 34741 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
$130.04 typical visit price
range $56.00 – $171.84
Typical copayment $32.51 (range $14.00 – $42.96)
Most-billed visit code 99204
Established Patient
$99.16 typical visit price
range $17.57 – $139.16
Typical copayment $24.79 (range $4.39 – $34.79)
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 4

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

DR. CHRISTOPHER M COOPER M.D.
Internal Medicine
806 W OAK ST
KISSIMMEE, FL 34741
Osceola County (407) 483-3376
JOMARIS CENTENO GIRONA
Internal Medicine
806 W OAK ST
KISSIMMEE, FL 34741
Osceola County (407) 483-3376
ROGER CROUSE MD
Internal Medicine
806 W OAK ST
KISSIMMEE, FL 34741
Osceola County (407) 483-3376
NIMA MOHAMADALI HOSSEINIAN MD
Internal Medicine
806 W OAK ST
KISSIMMEE, FL 34741
Osceola County (407) 483-3376

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 Mark Johnson's NPI number?

The NPI number for Mark Johnson is 1740783554. It was assigned to this individual provider in the NPPES registry on March 18, 2018.

Where is Mark Johnson located?

Mark Johnson practices at 806 W Oak St, Kissimmee, FL 34741. The listed phone number is (407) 483-3376.

What is Mark Johnson's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mark Johnson enrolled in Medicare?

Yes. Mark Johnson 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 Mark Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Johnson reassigns Medicare benefits to 2 organizations: Osceola Surgical Associates LLC (Kissimmee, FL) and Hospital Medicine Services Of Fl, LLC (Aventura, FL). 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 Mark Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Johnson accept?

Health plans from Ambetter Health, Ambetter from Superior HealthPlan, Ambetter of Alabama, Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) and 2 other insurers list Mark Johnson 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 Mark Johnson affiliated with any hospitals?

According to CMS data, Mark Johnson is affiliated with Hca Florida Osceola Hospital.

When was this NPI record last updated?

The NPPES record for Mark Johnson was last updated on June 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.