DR. ANA ELIZABETH MARKELZ MD
NPI 1427249259
Internal Medicine - Infectious Disease in Fort Sam Houston, TX
NPI Status: Active since August 07, 2007
Contact Information
3551 ROGER BROOKE DR
MCHE-QD, BLDG 3600
FORT SAM HOUSTON, TX
ZIP 78234
Phone: (210) 916-5554
- Individual
- Female
- Internal Medicine
- Infectious Disease
- PECOS Enrolled
About ANA MARKELZ
This page provides the complete NPI Profile along with additional information for Ana Markelz, an internist established in Fort Sam Houston, Texas with a medical specialization in Internal Medicine, focusing in infectious disease . The healthcare provider is registered in the NPI registry with number 1427249259 assigned on August 2007. The practitioner's primary taxonomy code is 207RI0200X with license number 0101242988 (VA). The provider is registered as an individual and her NPI record was last updated 13 years ago.
- NPI
- 1427249259
- Provider Name
- DR. ANA ELIZABETH MARKELZ MD
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 3551 ROGER BROOKE DR MCHE-QD, BLDG 3600 FORT SAM HOUSTON, TX 78234
- Location Phone
- (210) 916-5554
- Mailing Address
- 3551 ROGER BROOKE DR MCHE-QD,; BLDG 3600 FORT SAM HOUSTON, TX 78234
- Mailing Phone
- (210) 916-7069
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-07-2007
- Last Update Date
- 07-06-2012
- Code Navigator
An internist like Ana Markelz is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine Infectious Disease
- Taxonomy Code
- 207RI0200X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 0101242988
- License State
- VA
- Taxonomy Description
- An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Medicare Participation & PECOS Enrollment Status
Ana Markelz is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Oxygen and Supplies (DC002N)
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
DME-Oxygen and Supplies (DC000N)
Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing (HCPCS:K0738)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
Physician Visit Costs
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 78234 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $126.4
- Minimum New Patient Price $54.84
- Maximum New Patient Price $166.88
- Average New Patient Copayment $31.6
- Minimum New Patient Copayment $13.71
- Maximum New Patient Copayment $41.72
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $97.05
- Minimum Established Patient Price $17.52
- Maximum Established Patient Price $136.11
- Average Established Patient Copayment $24.26
- Minimum Established Patient Copayment $4.38
- Maximum Established Patient Copayment $34.02
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 4 | 2 | 7 | 2 | 4 | 9 | 2 | 5 | 9 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 4 | 4 | 7 | 4 | 4 | 18 | 2 | 10 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 4 + 4 + 7 + 4 + 4 + 1 + 8 + 2 + 1 + 0 + 24 = 61 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 70 - 61 = 9 | 9 | ||||||||
The NPI number 1427249259 is valid because the calculated check digit 9 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1659361194 | MARK ALAN BARNHARDT D.O. Individual | Pediatrics | 3551 ROGER BROOKE DR DEPARTMENT OF PEDIATRICS/ADOLESCENT MEDICINE FORT SAM HOUSTON, TX 78234 (210) 916-3160 |
| 1821177189 | DR. SCOTT JARED BENTLEY D.O. Individual | Pediatrics (Pediatric Cardiology) | 3551 ROGER BROOKE DR FORT SAM HOUSTON, TX 78234 (210) 916-4129 |
| 1548471139 | TASLIM ALLIBHAI DAWOOD M.D. Individual | Pediatrics (Neonatal-Perinatal Medicine) | 3551 ROGER BROOKE DR NEONATOLOGY FORT SAM HOUSTON, TX 78234 (210) 916-7078 |
| 1194972182 | MRS. CHRISTINE DONNA JOHNSON ANP BC Individual | Nurse Practitioner (Primary Care) | 3551 ROGER BROOKE DR DEPARTMENT OF PEDIATRICS/ADOLESCENT MEDICINE FORT SAM HOUSTON, TX 78234 (210) 916-3160 |
| 1861766164 | DR. JONATHAN BOY MD Individual | Student in an Organized Health Care Education/Training Program | 3551 ROGER BROOKE DR MCHE/ME FORT SAM HOUSTON, TX 78234 (423) 557-5399 |
| 1205195567 | DR. SAMUEL BRYAN MONTGOMERY M.D. Individual | Student in an Organized Health Care Education/Training Program | 3551 ROGER BROOKE DR MCHE-QD(CREDS) FORT SAM HOUSTON, TX 78234 (210) 916-2460 |
| 1326308446 | MISS STEPHANIE RAE NIEDZIELSKI OTR/L Individual | Occupational Therapist | 3551 ROGER BROOKE DR MCHE-QD (CREDS) FORT SAM HOUSTON, TX 78234 (210) 808-2237 |
| 1992760045 | DR. STEVEN JEFFREY HUDAK M.D. Individual | Urology | 3551 ROGER BROOKE DR MCHE-SDU, BUILDING 3600 SAN ANTONIO, TX 78234 (210) 916-1163 |
| 1558610428 | JULIANA MARIA VALENTE MSOT Individual | Occupational Therapist | 3551 ROGER BROOKE DR SAN ANTONIO, TX 78234 (210) 808-2237 |
| 1457601213 | KRISTIN DE GUZMAN OTR/L Individual | Occupational Therapist | 3551 ROGER BROOKE DR MCHE-QD (CREDS) SAN ANTONIO, TX 78234 (210) 808-2231 |
| 1366403891 | DR. HEATHER C YUN M.D. Individual | Internal Medicine (Infectious Disease) | 3551 ROGER BROOKE DR MCHE-MDI FORT SAM HOUSTON, TX 78234 (210) 916-5554 |
| 1134292147 | DR. DEAN AFIF SHOUCAIR D.O., M.P.H. Individual | Preventive Medicine (Preventive Medicine/Occupational Environmental Medicine) | 3551 ROGER BROOKE DR RM 114-13 (OCCUPTIONAL HEALTH/PREVENTIVE MEDICINE) SAN ANTONIO, TX 78234 (210) 916-9435 |
| 1154575918 | MONICA BEATRICE DU BOIS PA-C Individual | Physician Assistant | 3551 ROGER BROOKE DR BROOKE ARMY MEDICAL CENTER FORT SAM HOUSTON, TX 78234 (210) 916-0935 |
| 1801831052 | DR. EDWARD CONRAD MICHAUD III MD Individual | Hospitalist | 3551 ROGER BROOKE DR BROOKE ARMY MEDICAL CENTER FORT SAM HOUSTON, TX 78234 (210) 916-4587 |
| 1477895928 | LEANNE STEPHENSON M.D. Individual | Student in an Organized Health Care Education/Training Program | 3551 ROGER BROOKE DR MCHE/ME SAN ANTONIO, TX 78234 (210) 916-5545 |
| 1619210515 | GABRIEL JENKO Individual | Student in an Organized Health Care Education/Training Program | 3551 ROGER BROOKE DR MCHE/ME SAN ANTONIO, TX 78234 (210) 916-5545 |
| 1720077811 | DR. JACK EDWARD LEWI M.D. Individual | Internal Medicine (Endocrinology, Diabetes & Metabolism) | 3551 ROGER BROOKE DR ATTN: MCHE-MDE FORT SAM HOUSTON, TX 78234 (210) 916-8589 |
| 1861482416 | DR. MICHAEL JAMES MORRIS M.D. Individual | Internal Medicine (Pulmonary Disease) | 3551 ROGER BROOKE DR BROOKE ARMY MEDICAL CENTER FORT SAM HOUSTON, TX 78234 (210) 916-2222 |
| 1215905252 | DR. JOHN HENRY SLADKY M.D. Individual | Psychiatry & Neurology (Neuromuscular Medicine) | 3551 ROGER BROOKE DR BROOKE ARMY MEDICAL CENTER DEPT OF NEUROLOGY SAN ANTONIO, TX 78234 (210) 916-2203 |
| 1780780759 | MRS. JENNIFER LYNNE OTT PA-C Individual | Physician Assistant (Medical) | 3551 ROGER BROOKE DR FORT SAM HOUSTON, TX 78234 (210) 916-3334 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1427249259, enumerated in the NPI registry as an "individual" on August 07, 2007
The provider is located at 3551 Roger Brooke Dr Mche-qd, Bldg 3600 Fort Sam Houston, Tx 78234 and the phone number is (210) 916-5554
The provider's speciality is Internal Medicine with taxonomy code 207RI0200X with a focus in Infectious Disease
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
Medicare beneficiaries should expect a typical cost of $126.4 with an average copayment of $31.6 for new patient appointments. Established patients should expect a typical charge of $97.05 and an average copayment of 24.26. Please review your insurance plan or contact the provider directly to determine your specific costs.
This NPI record was last updated on August 07, 2007. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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