Dr. Mark Donald Schellhammer , DO
Specialist • Ocoee, FL
1555 Boren Dr
Ocoee, FL 347612989
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on September 13, 2006; this date does not establish years in practice.
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Published CMS data list 75 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Progesterone (Progesterone, Micronized) — 21 prescription fills, including refills.
- Buprenorphine-Naloxone (Buprenorphine Hcl/Naloxone Hcl) — 18 prescription fills, including refills.
- Testosterone Cypionate — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 80% of clinicians listed under Specialist in Florida (2024, 508 clinicians with data). Median for this group: 602. Middle half: 126 to 2,340.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 75 in 2013 to 75 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2024.
Practice Location & Contact Primary Location
1555 Boren Dr
Ocoee, FL 347612989
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Specialist: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
130 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$3,875 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Ocoee and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% of clinicians listed under Specialist in Florida (2024, 508 clinicians with data). Median for this group: 602. Middle half: 126 to 2,340.
Too few clinicians listed under Specialist in Ocoee have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Specialist in Florida (2024, 508 clinicians with data). Median for this group: $35,772. Middle half: $2,466 to $359,998.
Too few clinicians listed under Specialist in Ocoee have Medicare Part D data for 2024 to compare.
5 active clinicians are listed under Specialist with a practice address in Ocoee, FL (2,695 in Florida).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 75 in 2013 and 75 in 2024.
- 2013: 75
- 2023: 36
- 2024: 75
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30-day fills
30-day fills increased 73% from 75 in 2013 to 130 in 2024.
- 2013: 75
- 2023: 36
- 2024: 130
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Part D drug cost
Part D drug cost increased 210% from $1,249 in 2013 to $3,875 in 2024.
- 2013: $1,249
- 2023: $885
- 2024: $3,875
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
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| Progesterone | Progesterone, Micronized | 21 | 1,870 | $1,033.57 | — |
| Buprenorphine-Naloxone | Buprenorphine Hcl/Naloxone Hcl | 18 | 492 | $1,743.44 | — |
| Testosterone Cypionate | Testosterone Cypionate | 13 | 798 | $653.69 | — |
| Prednisone | Prednisone | 12 | 61 | $27.41 | — |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 11 | 300 | $417.07 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant (Certified)
Specialist
Doctor of Medicine (M.D.)
Physical Therapist - Orthopedic
Physical Therapist
Specialist
Doctor of Medicine (M.D.)
Pain Medicine - Pain Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated September 13, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Mailing Address
1555 Boren Dr
Ocoee, FL 347612989
Phone: 4072922156