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Dr. Mark A Folmsbee , DO

General Practice • San Fernando, CA

Active NPI 1427393123 Individual Practitioner Male Practitioner
Practice location in NPPES

732 Mott St Ste 100-110
San Fernando, CA 913404237

Call 8189635690 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

732 Mott St Ste 100-110

San Fernando, CA 913404237

Telephone 8189635690
Organization at the Same NPPES Address or Phone
San Fernando Community Health Center Facility NPI 1093151821

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 1 additional practice-address record in Victorville, CA. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare-allowed amount

About $9,166 in 2021

The total amount Medicare approved for these services in 2021. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021.

Paid by Medicare

About $5,370 in 2021

The part of the Medicare-allowed amount that Medicare itself paid in 2021, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021.

30-day fills

3,917 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

$224,194 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

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.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $14.27 in 2024

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2024.

Guide: How to read an Open Payments record

NPI first issued

2012

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?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Folmsbee has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Folmsbee as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in San Fernando and California

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

More Part D prescriptions than 60% of clinicians listed under General Practice in California (2024, 610 clinicians with data). Median for this group: 758. Middle half: 125 to 3,707.

Too few clinicians listed under General Practice in San Fernando have Medicare Part D data for 2024 to compare.

Part D drug cost

A higher Part D drug cost than 70% of clinicians listed under General Practice in California (2024, 610 clinicians with data). Median for this group: $48,894. Middle half: $2,044 to $279,308.

Too few clinicians listed under General Practice in San Fernando have Medicare Part D data for 2024 to compare.

Medicare Part B

Comparisons use 2024 data. The latest CMS data for Dr. Folmsbee are from 2021.

4 active clinicians are listed under General Practice with a practice address in San Fernando, CA (1,963 in California).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Physician & Other Practitioners (2021), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2024
Disclosure Year:

Program year 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $14.27.

Manufacturer Payment Nature Product Type Amount ($)
Bayer Healthcare Pharmaceuticals Inc.
Food and Beverage
In-kind items and services
Kerendia General $14.27

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2021.

CMS Part B · Data Year 2021

CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2020 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2021; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
96 47 $188.85 $95.48

Source: CMS Part B by Provider and Service, 2021; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Atorvastatin Calcium Atorvastatin Calcium 144 12,230 $1,142.94 69
Lisinopril Lisinopril 111 8,995 $607.42 58
Amlodipine Besylate Amlodipine Besylate 107 8,052 $682.12 46
Levothyroxine Sodium Levothyroxine Sodium 99 8,054 $1,175.22 41
Losartan Potassium Losartan Potassium 90 7,042 $754.55 33
Albuterol Sulfate Hfa Albuterol Sulfate 66 2,598 $2,059.19 30
Mounjaro Tirzepatide 64 1,918 $70,922.29 12
Metformin Hcl Metformin Hcl 62 4,630 $255.47 32
Metoprolol Tartrate Metoprolol Tartrate 57 4,360 $397.41 26
Azithromycin Azithromycin 51 253 $198.30 43
Gabapentin Gabapentin 49 3,180 $816.22 29
Metoprolol Succinate Metoprolol Succinate 47 3,690 $531.13 21
Eliquis Apixaban 43 2,242 $41,516.58 17
Furosemide Furosemide 41 2,499 $125.03 20
Omeprazole Omeprazole 41 2,910 $385.38 18
Famotidine Famotidine 41 2,804 $398.15 18
Simvastatin Simvastatin 34 2,520 $193.41 12
Lidocaine Lidocaine 33 1,110 $2,783.84 19
Hydrochlorothiazide Hydrochlorothiazide 32 1,589 $54.77 17
Pantoprazole Sodium Pantoprazole Sodium 31 2,390 $385.31 15
Potassium Chloride Potassium Chloride 31 1,754 $251.00 12
Tamsulosin Hcl Tamsulosin Hcl 29 2,370 $301.98 16
Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim 28 257 $98.54 26
Ibuprofen Ibuprofen 27 1,139 $200.90 15
Basaglar Kwikpen U-100 Insulin Glargine,hum.Rec.Anlog 27 1,215 $16,758.20 —

(top 25 shown)

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

Self-certified to NPPES: 2020-10-27
General Practice Primary Specialty

NUCC Taxonomy Code: 208D00000X

License # reported to NPPES CA 14847

A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - GENERAL PRACTICE

Medicare Enrollment ID

I20161012000646

Enrollment State Jurisdiction

CA

PECOS Control ID

6800184557

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Secondary Practice Locations

13455 Snowdrop Ct

Victorville, CA 923949583

Phone: 3344342031

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

10 listed
NPI 1346655677

Doctor of Dental Medicine

Dr. Maria Arciniega , DDS

Dentist - General Practice

NPI 1568182053

Doctor of Dental Surgery

NPI 1508307745

Doctor of Osteopathic Medicine (D.O.)

Vishaal Buch

Family Medicine

NPI 1801200613
Dr. Tiffany Chang , DDS

Dentist - General Practice

NPI 1134742026

Doctor of Dental Surgery

Adriana Cobian , NP

Nurse Practitioner - Family

NPI 1801936489

Nurse Practitioner

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

11 Historical Events
âś…
NPI Profile Active December 07, 2017

NPI status registered as active in NPPES database

📍
Updated Practice Location December 07, 2017

Registered at 732 MOTT ST STE 100-110, SAN FERNANDO, CA 913404237 (Tel: 8189635690)

📍
Updated Business Mailing Address December 07, 2017

Registered at 437 N. EUCLID AVE, UNICARE COMMUNITY HEALTH CENTER, ONTARIO, CA 91762 (Tel: 3344342031)

👤
Provider Name / Credentials Updated December 07, 2017

Recorded as MARK FOLMSBEE, D.O.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) December 07, 2017

General Practice (license number reported to NPPES: CA 14847)

âś…
NPI Profile Active July 20, 2016

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) July 20, 2016

Registered at 13455 SNOWDROP CT, VICTORVILLE, CA 923949583 (Tel: 3344342031)

📍
Business Mailing Address (Initial Record) July 20, 2016

Registered at 437 N. EUCLID AVE, UNICARE COMMUNITY HEALTH CENTER, ONTARIO, CA 91762 (Tel: 3344342031)

👤
Provider Name / Credentials (Initial Record) July 20, 2016

Recorded as MARK FOLMSBEE, D.O.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 20, 2016

General Practice (license number reported to NPPES: CA 14847)

🟢
Initial NPI Registration & Enumeration December 06, 2012

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1427393123
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 06, 2012
Last Update: October 27, 2020
Sole Proprietor: Yes

Mailing Address

437 N. Euclid Ave, Unicare Community Health Center

Ontario, CA 91762

Phone: 3344342031

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.