Erika Gleva , PA-C
Physician Assistant • Aspen, CO
225 N Mill St Ste 116
Aspen, CO 816111958
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 6, 2013; this date does not establish years in practice.
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Published CMS data list 536 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 109 service units.
- 36415 — Insertion of needle into vein for collection of blood sample: 70 service units.
- 73130 — X-ray of hand, minimum of 3 views: 42 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 15 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 479 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:
- Prednisone — 110 prescription fills, including refills.
- Allopurinol — 89 prescription fills, including refills.
- Hydroxychloroquine Sulfate — 85 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 9 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 75% of clinicians listed under Physician Assistant in Colorado (2024, 1,641 clinicians with data). Median for this group: 195. Middle half: 69 to 517.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 318 in 2020 to 536 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
225 N Mill St Ste 116
Aspen, CO 816111958
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Ann M Mass Md Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2012
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
94 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $21,367 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
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, 2024.
Paid by Medicare
About $16,116 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
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, 2024.
30-day fills
1,007 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
$110,576 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
Years since graduation
14 years (graduated 2012)
CMS Doctors and Clinicians data list 2012 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2013
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.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Erika Gleva 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.
Can order Medicare-covered services
CMS lists Erika Gleva 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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
Compared with the same specialty in Aspen and Colorado
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Physician Assistant in Colorado (2024, 1,641 clinicians with data). Median for this group: 195. Middle half: 69 to 517.
Too few clinicians listed under Physician Assistant in Aspen have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 60% of clinicians listed under Physician Assistant in Colorado (2024, 1,641 clinicians with data). Median for this group: $15,616. Middle half: $6,273 to $34,912.
Too few clinicians listed under Physician Assistant in Aspen have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 60% of clinicians listed under Physician Assistant in Colorado (2024, 1,641 clinicians with data). Median for this group: $11,339. Middle half: $4,686 to $25,550.
Too few clinicians listed under Physician Assistant in Aspen have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 65% of clinicians listed under Physician Assistant in Colorado (2024, 2,034 clinicians with data). Median for this group: 194. Middle half: 63 to 625.
Too few clinicians listed under Physician Assistant in Aspen have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Physician Assistant in Colorado (2024, 2,034 clinicians with data). Median for this group: $3,374. Middle half: $574 to $55,951.
Too few clinicians listed under Physician Assistant in Aspen have Medicare Part D data for 2024 to compare.
9 active clinicians are listed under Physician Assistant with a practice address in Aspen, CO (3,767 in Colorado).
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 B services
Medicare Part B services increased 69% from 318 in 2020 to 536 in 2024.
- 2020: 318
- 2021: 424
- 2022: 367
- 2023: 407
- 2024: 536
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Medicare-allowed amount
Medicare-allowed amount varied from year to year: $23,525 in 2020 and $21,367 in 2024.
- 2020: $23,525
- 2021: $39,553
- 2022: $34,152
- 2023: $19,726
- 2024: $21,367
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Paid by Medicare
Paid by Medicare varied from year to year: $16,950 in 2020 and $16,116 in 2024.
- 2020: $16,950
- 2021: $30,666
- 2022: $25,375
- 2023: $15,161
- 2024: $16,116
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 51% from 984 in 2020 to 479 in 2024.
- 2020: 984
- 2021: 1,124
- 2022: 1,473
- 2023: 390
- 2024: 479
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30-day fills
30-day fills decreased 45% from 1,847 in 2020 to 1,007 in 2024.
- 2020: 1,847
- 2021: 2,193
- 2022: 3,057
- 2023: 778
- 2024: 1,007
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Part D drug cost
Part D drug cost decreased 52% from $231,504 in 2020 to $110,576 in 2024.
- 2020: $231,504
- 2021: $409,916
- 2022: $1,065,343
- 2023: $16,362
- 2024: $110,576
Sources: CMS Medicare Physician & Other Practitioners (2024), 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.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2017–2023 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, 2018–2024; 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 |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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109 | 63 | $248.13 | $110.72 |
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36415
Insertion of needle into vein for collection of blood sample
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70 | 46 | $9.00 | $8.65 |
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73130
X-ray of hand, minimum of 3 views
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42 | 21 | $58.43 | $30.45 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
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33 | 24 | $19.00 | $7.61 |
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85652
Red blood cell sedimentation rate, to detect inflammation, automated
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33 | 25 | $6.00 | $2.65 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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33 | 27 | $176.45 | $79.29 |
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82565
Blood creatinine level
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29 | 19 | $12.00 | $5.02 |
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84550
Uric acid level, blood
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29 | 25 | $11.00 | $4.43 |
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73620
X-ray of foot, 2 views
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28 | 14 | $134.00 | $22.34 |
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81001
Manual urinalysis test with examination using microscope, automated
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26 | 24 | $8.00 | $3.11 |
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82040
Albumin (protein) level
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25 | 18 | $12.00 | $4.85 |
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80053
Blood test, comprehensive group of blood chemicals
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22 | 19 | $25.00 | $10.35 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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21 | 21 | $338.00 | $140.21 |
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84450
Liver enzyme (sgot), level
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18 | 12 | $12.00 | $5.08 |
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84460
Liver enzyme (sgpt), level
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18 | 12 | $13.00 | $5.19 |
Source: CMS Part B by Provider and Service, 2024; 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.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Prednisone | Prednisone | 110 | 3,318 | $783.21 | 43 |
| Allopurinol | Allopurinol | 89 | 7,930 | $785.69 | 31 |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 85 | 5,447 | $2,985.77 | 23 |
| Colchicine | Colchicine | 67 | 4,146 | $4,329.56 | 19 |
| Methotrexate | Methotrexate Sodium | 59 | 4,643 | $1,511.65 | 24 |
| Mycophenolate Mofetil | Mycophenolate Mofetil | 20 | 570 | $924.76 | — |
| Omeprazole | Omeprazole | 19 | 1,760 | $364.55 | — |
| Leflunomide | Leflunomide | 17 | 1,530 | $777.84 | — |
| Enbrel | Etanercept | 13 | 364 | $98,112.95 | — |
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: 2025-07-29NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20230203000214
CO
0446512933
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Ann M Mass Md Pc
225 N Mill St, Aspen, CO 816111958
Phone: 9705441234
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 225 N MILL ST STE 116, ASPEN, CO 816111958 (Tel: 9705441234)
Registered at 225 N MILL ST STE 116, ASPEN, CO 816111958 (Tel: 9705441234)
Registered at 1925 MOUNTAIN VIEW AVE, LONGMONT, CO 805013128 (Tel: 7204943158)
Registered at 1925 MOUNTAIN VIEW AVE, LONGMONT, CO 805013128 (Tel: 7204943158)
Registered at LAHEY HOSPITAL & MEDICAL CENTER, 41 MALL ROAD, BURLINGTON, MA 018050001 (Tel: 7817448551)
Registered at LAHEY HOSPITAL & MEDICAL CENTER, 41 MALL ROAD, BURLINGTON, MA 018050001 (Tel: 7817448551)
Physician Assistant (license number reported to NPPES: MA PA6398)
Registered at LAHEY HOSPITAL & MEDICAL CENTER, 41 MALL ROAD, BURLINGTON, MA 018050001 (Tel: 7817448551)
Physician Assistant (license number reported to NPPES: MA PA6398)
NPI status registered as active in NPPES database
Registered at 4125 SORRENTO VALLEY BLVD, SAN DIEGO, CA 921211423 (Tel: 8587949192)
Registered at 4125 SORRENTO VALLEY BLVD, SAN DIEGO, CA 921211423 (Tel: 8587949192)
Recorded as ERIKA GLEVA, PA-C
Physician Assistant (license number reported to NPPES: CA 23148)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Aspen
Mailing Address
225 N Mill St Ste 116
Aspen, CO 816111958
Phone: 9705441234