insurance_plan_type choices:

Value	Description
AM	Automobile Medical
BL	Blue Cross/Blue Shield
CH	Champus
CI	Commercial Insurance Co.
17	Dental Maintenance Organization
DS	Disability
14	Exclusive Provider Organization (EPO)
FI	Federal Employees Program
HM	Health Maintenance Organization
16	Health Maintenance Organization (HMO) Medicare Risk
15	Indemnity Insurance
LM	Liability Medical
MC	Medicaid
MA	Medicare Part A
MB	Medicare Part B
ZZ	Mutually Defined
OF	Other Federal Program
11	Other Non-Federal Programs
13	Point of Service (POS)
12	Preferred Provider Organization (PPO)
TV	Title V
VA	Veterans Affairs Plan
WC	Workers' Compensation Health Claim