STEPHEN MARK SOLOFF II
NPI 1699641605
Anesthesiologist Assistant in Greenwood Village, CO

NPI Status: Active since October 15, 2025

Contact Information

8000 E MAPLEWOOD AVE STE 120
GREENWOOD VILLAGE, CO
ZIP 80111
Phone: (303) 438-3999
Fax: (720) 439-9500

NPI Profile Information
Primary Taxonomy
Secondary Locations
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Anesthesiologist Assistant

About STEPHEN SOLOFF

This page provides the complete NPI Profile along with additional information for Stephen Soloff, a provider established in Greenwood Village, Colorado with a medical specialization in Anesthesiologist Assistant. The healthcare provider is registered in the NPI registry with number 1699641605 assigned on October 2025. The practitioner's primary taxonomy code is 367H00000X with license number ANT.0000328 (CO). The provider is registered as an individual and his NPI record was last updated February 2026.

NPI: 1699641605
Provider Name: STEPHEN MARK SOLOFF II
Gender: Male
Entity Type: Individual
Location Address: 8000 E MAPLEWOOD AVE STE 120 GREENWOOD VILLAGE, CO 80111
Location Phone: (303) 438-3999
Location Fax: (720) 439-9500
Mailing Address: PO BOX 840862 DALLAS, TX 75284
Mailing Phone: (303) 377-7638
Mailing Fax: (720) 439-9500
Is Sole Proprietor?: No
Enumeration Date: 10-15-2025
Last Update Date: 02-10-2026
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Location Map

Secondary Locations

1365 Poplar Ridge Ct
Brookfield, WI 53045
(760) 822-2819

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: Anesthesiologist Assistant
Taxonomy Code: 367H00000X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: ANT.0000328
License State: CO
Taxonomy Description: An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.

NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1699641605, we treat the final digit (5) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 2

Pos 8

Unchanged

Pos 9

Doubled → 0

Check

Target digit

Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 9 → 18 → 9 6 → 12 → 3 1 → 2 0 → 0

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 6 + 1 + 8 + 9 + 1 + 2 + 4 + 2 + 6 + 0 + 24 = 65

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5

This NPI is valid

The calculated check digit is 5, which matches the last digit of 1699641605.